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Dr Craig Dalton

Conjoint Associate Professor

School of Medicine and Public Health

Career Summary

Biography

Craig Dalton is a public health physician with a MMSc in Clinical Epidemiology from the University of Newcastle and is a graduate of the CDC Epidemic Intelligence Service, Atlanta, Georgia. He completed a Preventive Medicine Fellowship in the Foodborne and Diarrhoeal Disease Branch at CDC in 1995.

He is a public health physician employed with the NSW Government and conjoint senior lecturer in the School of Medicine and Public Health, University of Newcastle. My main experience is in health protection issues - communicable diseases and environmental health. He is director of www.flutracking.net - a national online survey of 16,000 participants every Monday morning in winter to track influenza-like illness.

He is course coordinator for Buddhist and other Contemplative Traditions RELT1022 at the University of Newcastle. He has a great interest in the underlying philosophy of public health and the exploration of eastern concepts of interdependence in developing such a philosophy, to this end I have been piloting a program of Contemplative Practice in Public Health for public health practitioners.

Research Expertise
Craig's research expertise is in areas of applied public health practice. He founded the national influenza-like illness surveillance system Flutracking.net and has expertise in influenza surveillance, foodborne disease epidemiology and environmental health impact assessment.

Teaching Expertise
Craig is the course coordinator for RELT1022 Buddhist and other Contemplative Traditions. 


Qualifications

  • Master of Medical Science, University of Newcastle
  • Bachelor of Medicine, University of Newcastle

Keywords

  • contemplative practice
  • public health

Fields of Research

Code Description Percentage
111799 Public Health and Health Services not elsewhere classified 45
050204 Environmental Impact Assessment 20
111706 Epidemiology 35
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Publications

For publications that are currently unpublished or in-press, details are shown in italics.


Journal article (85 outputs)

Year Citation Altmetrics Link
2017 Kypri K, Dorji G, Dalton C, 'Alcohol and economic development: Observations on the kingdom of Bhutan', DRUG AND ALCOHOL REVIEW, 36 333-336 (2017)
DOI 10.1111/dar.12382
Citations Web of Science - 1
Co-authors Kypros Kypri
2017 Dalton CB, 'Enablers of innovation in digital public health surveillance: lessons from Flutracking', INTERNATIONAL HEALTH, 9 145-147 (2017)
DOI 10.1093/inthealth/ihx009
2016 Dalton CB, Carlson SJ, Durrheim DN, Butler MT, Cheng AC, Kelly HA, 'Flutracking weekly online community survey of influenza-like illness annual report, 2015', Communicable diseases intelligence quarterly report, 40 E512-E520 (2016) [C1]

Flutracking is a national online community influenza-like illness (ILI) surveillance system that monitors weekly ILI activity and impact in the Australian community. This article ... [more]

Flutracking is a national online community influenza-like illness (ILI) surveillance system that monitors weekly ILI activity and impact in the Australian community. This article reports on the 2015 findings from Flutracking. From 2014 to 2015 there was a 38.5% increase in participants to 27,824 completing at least 1 survey with a peak weekly response of 25,071 participants. The 2015 Flutracking national ILI weekly fever and cough percentages peaked in late August at 5.0% in the unvaccinated group, in the same week as the national counts of laboratory confirmed influenza peaked. A similar percentage of Flutracking participants took two or more days off from work or normal duties in 2015 (peak level 2.3%) compared with 2014 (peak level 2.5%) and the peak weekly percentage of participants seeking health advice was 1.6% in both 2014 and 2015. Flutracking fever and cough peaked in the same week as Influenza Complications Alert Network surveillance system influenza hospital admissions. The percentage of Flutracking participants aged 5 to 19 years with cough and fever in 2015 was the highest since 2011. The 2015 season was marked by a transition to predominantly influenza B strain circulation, which particularly affected younger age groups. However, for those aged 20 years and over, the 2015 national Flutracking influenza season was similar to 2014 in community ILI levels and impact.

Citations Scopus - 1Web of Science - 1
Co-authors D Durrheim
2016 Flint J, Dalton CB, Merritt TD, Graves S, Ferguson JK, Osbourn M, et al., 'Q FEVER AND CONTACT WITH KANGAROOS IN NEW SOUTH WALES', COMMUNICABLE DISEASES INTELLIGENCE, 40 E202-E203 (2016)
Citations Scopus - 1
Co-authors John Ferguson, D Durrheim
2016 Coghlan B, Kelly HA, Carlson SJ, Grant KA, Leder K, Dalton CB, Cheng AC, 'ESTIMATES OF INFLUENZA VACCINE COVERAGE FROM VICTORIAN SURVEILLANCE SYSTEMS BASED IN THE COMMUNITY, PRIMARY CARE AND HOSPITALS', COMMUNICABLE DISEASES INTELLIGENCE, 40 E204-E206 (2016) [C1]
Citations Scopus - 1Web of Science - 1
2016 Coghlan B, Carlson SJ, Leder K, Dalton CB, Cheng AC, 'TIMING OF INFLUENZA VACCINATION IN AN AUSTRALIAN COMMUNITY-BASED SURVEILLANCE SYSTEM, 2010-2014', COMMUNICABLE DISEASES INTELLIGENCE, 40 E352-E355 (2016) [C1]
2016 Dalton C, 'Bullshit for you; transcendence for me. A commentary on "On the reception and detection of pseudo-profound bullshit"', JUDGMENT AND DECISION MAKING, 11 121-122 (2016)
Citations Scopus - 3Web of Science - 3
2016 Fielding JE, Regan AK, Dalton CB, Chilver MB-N, Sullivan SG, 'How severe was the 2015 influenza season in Australia?', MEDICAL JOURNAL OF AUSTRALIA, 204 60-61 (2016)
DOI 10.5694/mja15.01094
Citations Scopus - 3Web of Science - 5
2015 Dalton CB, Carlson SJ, McCallum L, Butler MT, Fejsa J, Elvidge E, Durrheim DN, 'Flutracking weekly online community survey of influenza-like illness: 2013 and 2014.', Communicable diseases intelligence quarterly report, 39 E361-E368 (2015) [C1]
Citations Scopus - 1Web of Science - 3
Co-authors D Durrheim
2015 Pillsbury A, Cashman P, Leeb A, Regan A, Westphal D, Snelling T, et al., 'Real-time safety surveillance of seasonal influenza vaccines in children, Australia, 2015', Eurosurveillance, 20 (2015)

© 2015, European Centre for Disease Prevention and Control (ECDC). All rights reserved. Increased febrile reactions in Australian children from one influenza vaccine brand in 201... [more]

© 2015, European Centre for Disease Prevention and Control (ECDC). All rights reserved. Increased febrile reactions in Australian children from one influenza vaccine brand in 2010 diminished confidence in influenza immunisation, highlighting the need for improved vaccine safety surveillance. AusVaxSafety, a national vaccine safety surveillance system collected adverse events in young children for 2015 influenza vaccine brands in real time through parent/carer reports via SMS/email. Weekly cumulative data on 3,340 children demonstrated low rates of fever (4.4%) and medical attendance (1.1%). Fever was more frequent with concomitant vaccination.

DOI 10.2807/1560-7917.ES.2015.20.43.30050
Co-authors D Durrheim
2014 Cashman P, Moberley S, Dalton C, Stephenson J, Elvidge E, Butler M, Durrheim DN, 'Vaxtracker: Active on-line surveillance for adverse events following inactivated influenza vaccine in children', Vaccine, 32 5503-5508 (2014) [C1]

© 2014. Vaxtracker is a web based survey for active post marketing surveillance of Adverse Events Following Immunisation. It is designed to efficiently monitor vaccine safety of ... [more]

© 2014. Vaxtracker is a web based survey for active post marketing surveillance of Adverse Events Following Immunisation. It is designed to efficiently monitor vaccine safety of new vaccines by early signal detection of serious adverse events. The Vaxtracker system automates contact with the parents or carers of immunised children by email and/or sms message to their smart phone. A hyperlink on the email and text messages links to a web based survey exploring adverse events following the immunisation. The Vaxtracker concept was developed during 2011 (n= 21), and piloted during the 2012 (n= 200) and 2013 (n= 477) influenza seasons for children receiving inactivated influenza vaccine (IIV) in the Hunter New England Local Health District, New South Wales, Australia. Survey results were reviewed by surveillance staff to detect any safety signals and compare adverse event frequencies among the different influenza vaccines administered. In 2012, 57% (n= 113) of the 200 participants responded to the online survey and 61% (290/477) in 2013. Vaxtracker appears to be an effective method for actively monitoring adverse events following influenza vaccination in children.

DOI 10.1016/j.vaccine.2014.07.061
Citations Scopus - 9Web of Science - 9
Co-authors D Durrheim
2014 Dalton C, Wilson S, 'Removing incongruence - or Academic assimilation?', International Journal of Multiple Research Approaches, 8 248-249 (2014) [C3]
2013 Dalton CB, Carlson SJ, Butler MT, Elvidge E, Durrheim DN, 'Building Influenza Surveillance Pyramids in Near Real Time, Australia', Emerging Infectious Diseases, 19 1863-1865 (2013) [C1]
DOI 10.3201/eid1911.121878
Citations Scopus - 2Web of Science - 2
Co-authors D Durrheim
2013 Carlson SJ, Dalton CB, Butler MT, Fejsa J, Elvidge E, Durrheim DN, 'Flutracking weekly online community survey of influenza-like illness annual report 2011 and 2012', Communicable Diseases Intelligence Quarterly Report, 37 E398-E406 (2013) [C1]
Citations Scopus - 1Web of Science - 5
Co-authors D Durrheim
2012 Hurt AC, Hardie K, Wilson NJ, Deng YM, Osbourn M, Leang SK, et al., 'Characteristics of a widespread community cluster of H275Y Oseltamivir-Resistant A (H1N1)pdm09 influenza in Australia', Journal of Infectious Diseases, 206 148-157 (2012) [C1]
DOI 10.1093/infdis/jis337
Citations Scopus - 77Web of Science - 74
Co-authors Peter Wark, D Durrheim
2012 Dalton CB, 'The media and public health: Complexity, controversy and combat', Medical Journal of Australia, 197 546-547 (2012) [C3]
2012 Dalton CB, 'Banning retail tobacco sales: Time to start the discussion', Drug and Alcohol Review, 31 718-720 (2012) [C3]
Citations Scopus - 4Web of Science - 4
2011 Dalton CB, Carlson SJ, Butler MT, Feisa J, Elvidge E, Durrheim DN, 'Flutracking weekly online community survey of influenza-like illness annual report, 2010.', Communicable diseases intelligence, 35 288-293 (2011) [C2]

Flutracking is a national weekly online survey of influenza-like illness (ILI) completed by community members. Flutracking integrates participants' ILI symptom information wi... [more]

Flutracking is a national weekly online survey of influenza-like illness (ILI) completed by community members. Flutracking integrates participants' ILI symptom information with their influenza vaccination status to monitor influenza activity and field vaccine effectiveness (FVE). This report summarises results from the 2010 Flutracking season compared with previous seasons. Nationally, participation in Flutracking has more than doubled between 2008 and 2010, with 5,346 new participants enrolled or recruited in 2010 and a peak weekly participation of 10,773. By the end of the 2010 season, 5,904 of 9,109 (64.8%) participants had received the monovalent pandemic vaccine and/or the 2010 seasonal vaccine. From 2007 to 2010 FVE calculations demonstrated that the seasonal vaccine was effective except in 2009 during the pandemic. Peak 2010 ILI activity occurred in early June and August, and peak weekly 2010 ILI rates (4.2% among unvaccinated participants) were lower than the peak ILI rates during the 2009 pandemic (6.0% among unvaccinated participants). However, the decrease in laboratory notifications was much larger than the decrease in Flutracking rates. In summary, the number of Flutracking participants continued to steadily increase over the 2010 influenza season. The system has shown value in providing weekly vaccination uptake data during and beyond the 2009 influenza pandemic, as well as rapid FVE estimates that are qualitatively aligned with findings from other analyses of vaccine efficacy. Flutracking has also provided estimates of weekly community ILI activity that were not biased by health seeking behaviour and clinician testing practices.

Citations Scopus - 7Web of Science - 11
Co-authors D Durrheim
2011 Dalton CB, Merritt TD, Unicomb LE, Kirk MD, Stafford RJ, Lalor K, Ozfoodnet Working Group, 'A national case-control study of risk factors for listeriosis in Australia', Epidemiology and Infection, 139 437-445 (2011) [C1]
DOI 10.1017/s0950268810000944
Citations Scopus - 12Web of Science - 10
2010 Dawood FS, Hope KG, Durrheim DN, Givney R, Fry AM, Dalton CB, 'Estimating the Disease Burden of Pandemic (H1N1) 2009 Virus Infection in Hunter New England, Northern New South Wales, Australia', Plos One, 5 7 (2010) [C1]
DOI 10.1371/journal.pone.0009880
Citations Scopus - 13Web of Science - 11
Co-authors D Durrheim
2010 Dalton CB, 'Decision aids and screening. Editorial was amoral.', BMJ (Clinical research ed.), 341 (2010)
Citations Scopus - 1
2010 Eastwood K, Durrheim DN, Merritt T, Massey PD, Huppatz C, Dalton CB, et al., 'Field exercises are useful for improving public health emergency responses', WSPAR: Western Pacific Surveillance and Response Journal, 1 1-7 (2010) [C1]
DOI 10.5365/wpsar.2010.1.1.003
Citations Web of Science - 2
Co-authors D Durrheim
2010 Dalton CB, Cretikos MA, Durrheim DN, Seppelt IM, Rawlinson WD, Dwyer DE, 'Comparison of adult patients hospitalised with pandemic (H1N1) 2009 influenza and seasonal influenza during the 'PROTECT' phase of the pandemic response', Medical Journal of Australia, 192 357-358 (2010) [C3]
Citations Web of Science - 5
Co-authors D Durrheim
2010 Carlson SJ, Durrheim DN, Dalton CB, 'Flutracking provides a measure of field influenza vaccine effectiveness, Australia, 2007-2009', Vaccine, 28 6809-6810 (2010) [C3]
DOI 10.1016/j.vaccine.2010.08.051
Citations Scopus - 7Web of Science - 9
Co-authors D Durrheim
2010 Dalton CB, 'Decision aids and screening: Editorial was amoral (Letter)', British Medical Journal, 341 1118 (2010) [C3]
Citations Scopus - 1Web of Science - 2
2010 Carlson SJ, Dalton CB, Durrheim DN, Fesja J, 'Online flutracking survey of influenza-like illness during Pandemic (H1N1) 2009, Australia', Emerging Infectious Diseases, 16 1960-1962 (2010) [C1]
DOI 10.3201/eid1612.100935
Citations Scopus - 9Web of Science - 13
Co-authors D Durrheim
2010 Hope K, Durrheim DN, Barnett D, D'Este CA, Kewley CD, Dalton CB, et al., 'Willingness of frontline health care workers to work during a public health emergency', Australian Journal of Emergency Management, 25 39-47 (2010) [C1]
Citations Scopus - 17Web of Science - 12
Co-authors Chris Kewley, D Durrheim, Catherine Deste
2010 Huppatz C, Gawarikar Y, Levi CR, Kelly PM, Williams D, Dalton CB, et al., 'Should there be a standardised approach to the diagnostic workup of suspected adult encephalitis? A case series from Australia', BMC Infectious Diseases, 10 1-6 (2010) [C1]
DOI 10.1186/1471-2334-10-353
Citations Scopus - 11Web of Science - 10
Co-authors D Durrheim, Christopher Levi
2009 Dalton CB, Merritt T, Durrheim DN, Munnoch S, Kirk M, 'A structured framework for improving outbreak investigation audits', BMC Public Health, 9 472 (2009) [C1]
DOI 10.1186/1471-2458-9-472
Co-authors D Durrheim
2009 Dawood FS, Dalton CB, Durrheim DN, Hope KG, 'Rates of hospitalisation for acute respiratory illness and the emergence of pandemic (H1N1) 2009 virus in the Hunter New England Area Health Service', Medical Journal of Australia, 191 573-574 (2009) [C3]
Citations Scopus - 2Web of Science - 3
Co-authors D Durrheim
2009 Parrella A, Dalton CB, Pearce R, Litt JCB, 'ASPREN surveillance system for influenza-like illness: A comparison with FluTracking and the National Notifiable Diseases Surveillance System', Australian Family Physician, 38 932-936 (2009) [C1]
Citations Scopus - 19Web of Science - 20
2009 Huppatz C, Durrheim DN, Levi CR, Dalton CB, Williams D, Clements MS, Kelly PM, 'Etiology of encephalitis in Australia, 1990-2007', Emerging Infectious Diseases, 15 1359-1365 (2009) [C1]
DOI 10.3201/eid1509.081540
Citations Scopus - 48Web of Science - 48
Co-authors Christopher Levi, D Durrheim
2009 Huppatz C, Kelly PM, Levi CR, Dalton CB, Williams D, Durrheim DN, 'Encephalitis in Australia, 1979-2006: Trends and aetiologies', Communicable Diseases Intelligence Quarterly Report, 33 192-197 (2009) [C1]
Citations Scopus - 15Web of Science - 11
Co-authors Christopher Levi, D Durrheim
2009 Carlson SJ, Dalton CB, Tuyl FA, Durrheim DN, Fejsa J, Muscatello DJ, et al., 'Flutracking surveillance: Comparing 2007 New South Wales results with laboratory confirmed influenza notifications', Communicable Diseases Intelligence Quarterly Report, 33 323-326 (2009) [C1]
Citations Scopus - 9Web of Science - 9
Co-authors D Durrheim, Frank Tuyl
2009 Dalton CB, Durrheim DN, Fejsa J, Francis JL, Carlson S, Tursan D'Espaignet E, Tuyl FA, 'Flutracking: A weekly Australian community online survey of influenza-like illness in 2006, 2007 and 2008', Communicable Diseases Intelligence Quarterly Report, 33 316-322 (2009) [C1]
Citations Scopus - 17Web of Science - 25
Co-authors D Durrheim, Frank Tuyl
2008 Kirk MD, Mckay I, Hall GV, Dalton CB, Stafford R, Unicomb L, Gregory J, 'Foodborne disease in Australia: The OzFoodNet experience', CLINICAL INFECTIOUS DISEASES, 47 392-400 (2008) [C1]
DOI 10.1086/589861
Citations Scopus - 33Web of Science - 42
2008 Huppatz CM, Munnoch SA, Worgan T, Merritt TD, Dalton CB, Kelly PM, Durrheim DN, 'A norovirus outbreak associated with consumption of NSW oysters: Implications for quality assurance systems', Communicable Diseases Intelligence Quarterly Report, 32 88-91 (2008) [C2]
Citations Scopus - 16Web of Science - 16
Co-authors D Durrheim
2008 Dalton CB, Durrheim DN, Conroy MA, 'Likely impact of school and childcare closures on public health workforce during an influenza pandemic: A survey', Communicable Diseases Intelligence Quarterly Report, 32 261-262 (2008) [C2]
Citations Scopus - 23Web of Science - 19
Co-authors D Durrheim
2008 Cretikos M, Eastwood K, Dalton CB, Merritt TD, Tuyl FA, Winn L, Durrheim DN, 'Household disaster preparedness and information sources: Rapid cluster survey after a storm in New South Wales, Australia', BMC Public Health, 8 1-9 (2008) [C1]
DOI 10.1186/1471-2458-8-195
Citations Scopus - 27Web of Science - 22
Co-authors D Durrheim, Frank Tuyl
2008 Stafford RJ, Schluter PJ, Wilson AJ, Kirk MD, Hall G, Unicomb L, et al., 'Population-attributable risk estimates for risk factors associated with Campylobacter infection, Australia', Emerging Infectious Diseases, 14 895-901 (2008)

In 2001-2002, a multicenter, prospective case-control study involving 1,714 participants =5 years of age was conducted in Australia to identify risk factors for Campylobacter infe... [more]

In 2001-2002, a multicenter, prospective case-control study involving 1,714 participants =5 years of age was conducted in Australia to identify risk factors for Campylobacter infection. Adjusted population-attributable risks (PARs) were derived for each independent risk factor contained within the final multivariable logistic regression model. Estimated PARs were combined with adjusted (for the =5 years of age eligibility criterion) notifiable disease surveillance data to estimate annual Australian Campylobacter case numbers attributable to each risk factor. Simulated distributions of "credible values" were then generated to model the uncertainty associated with each case number estimate. Among foodborne risk factors, an estimated 50,500 (95% credible interval 10,000-105,500) cases of Campylobacter infection in persons =5 years of age could be directly attributed each year to consumption of chicken in Australia. Our statistical technique could be applied more widely to other communicable diseases that are subject to routine surveillance.

Citations Scopus - 50
2008 Unicomb LE, Dalton CB, Gilbert GL, Becker NG, Patel MS, 'Age-specific risk factors for sporadic campylobacter infection in regional Australia', Foodborne Pathogens and Disease, 5 79-85 (2008) [C1]
DOI 10.1089/fpd.2007.0047
Citations Scopus - 22Web of Science - 23
2008 Dalton CB, Cretikos MA, Durrheim DN, 'A food 'lifeboat': Food and nutrition considerations in the event of a pandemic or other catastrophe [Letter]', Medical Journal of Australia, 188 679 (2008) [C3]
Citations Scopus - 2Web of Science - 1
Co-authors D Durrheim
2008 Unicomb LE, O'Reilly LC, Kirk MD, Stafford RJ, Smith HV, Becker NG, et al., 'Risk factors for infection with Campylobacter jejuni flaA genotypes', Epidemiology and Infection, 136 1480-1491 (2008)

We aimed to explore Campylobacter genotype-specific risk factors in Australia. Isolates collected prospectively from cases recruited into a case-control study were genotyped using... [more]

We aimed to explore Campylobacter genotype-specific risk factors in Australia. Isolates collected prospectively from cases recruited into a case-control study were genotyped using flaA restriction fragment-length polymorphism typing ( flaA genotyping). Exposure information for cases and controls was collected by telephone interview. Risk factors were examined for major flaA genotypes using logistic and multinomial regression. Five flaA genotypes accounted for 325 of 590 (55%) cases - flaA-6b (n=129), flaA-6 (n=70), flaA-10 (n=48), flaA-2 (n=43), flaA-131 (n=35). In Australia, infections due to flaA-10 and flaA-2 were found to be significantly associated with eating non-poultry meat (beef and ham, respectively) in both case-control and inter-genotype comparisons. All major genotypes apart from flaA-10 were associated with chicken consumption in the case-control comparisons. Based on several clinical criteria, infections due to flaA-2 were more severe than those due to other genotypes. Thus genotype analysis may reveal genotype-specific niches and differences in virulence and transmission routes. © 2008 Cambridge University Press.

DOI 10.1017/S0950268807000246
Citations Scopus - 5
Co-authors John Ferguson
2007 Mickan L, Doyle R, Valcanis M, Dingle KE, Unicomb L, Lanser J, et al., 'Multilocus sequence typing of Campylobacter jejuni isolates from New South Wales, Australia', Journal of Applied Microbiology, 102 144-152 (2007)

Aims: Multilocus sequence typing (MLST) was used to examine the diversity and population structure of Campylobacter jejuni isolates associated with sporadic cases of gastroenterit... [more]

Aims: Multilocus sequence typing (MLST) was used to examine the diversity and population structure of Campylobacter jejuni isolates associated with sporadic cases of gastroenteritis in Australia, and to compare these isolates with those from elsewhere. Methods and Results: A total of 153 Camp. jejuni isolates were genotyped. Forty sequence types (STs) were found, 19 of which were previously undescribed and 21 identified in other countries. The 19 newly described STs accounted for 43% of isolates, 16 of which were assigned to known clonal complexes. Eighty-eight percent of isolates were assigned to a total of 15 clonal complexes. Of these, four clonal complexes accounted for 60% of isolates. Three STs accounted for nearly 40% of all isolates and appeared to be endemic, while 21 STs were represented by more than one isolate. Seven infections were acquired during international travel, and the associated isolates all had different STs, three of which were exclusive to the travel-acquired cases. Comparison of serotypes among isolates from clonal complexes revealed further diversity. Eight serotypes were identified among isolates from more than one clonal complex, while isolates from six clonal complexes displayed serotypes not previously associated with those clonal complexes. Conclusions: Multilocus sequence typing is a useful tool for the discrimination of subtypes and examination of the population structure of Camp. jejuni associated with sporadic infections. Significance and Impact of the Study: This study highlights the genotypic diversity of Camp. jejuni in Australia, demonstrating that STs causing disease have both a global and a local distribution evident from the typing of domestically and internationally acquired Camp. jejuni isolates. © 2007 The Authors.

DOI 10.1111/j.1365-2672.2006.03049.x
Citations Scopus - 33
Co-authors John Ferguson
2007 Djordjevic SP, Unicomb LE, Adamson PJ, Mickan L, Rios R, Adamson P, et al., 'Clonal complexes of Campylobacter jejuni identified by multilocus sequence typing are reliably predicted by restriction fragment length polymorphism analyses of the flaA gene', Journal of Clinical Microbiology, 45 102-108 (2007)

Multilocus sequence typing (MLST) has provided important new insights into the population structure of Campylobacter jejuni and is rapidly becoming the gold standard for typing th... [more]

Multilocus sequence typing (MLST) has provided important new insights into the population structure of Campylobacter jejuni and is rapidly becoming the gold standard for typing this species. However, the methodology is comparatively costly and slow to perform for the routine surveillance testing of large numbers of isolates required by public health laboratories. Restriction fragment length polymorphism analysis of the flaA gene (RELP-flaA) and sequencing of the variable region in the fla locus (SVR-fla) were compared to MLST to determine if a low cost alternative could be found that reliably predicts clonal lineage (as determined by MLST). An isolate of C. jejuni from each of 153 patients from New South Wales, Australia, collected sequentially over a period of 30 months from 1999 to 2001 and comprising 40 sequence types (ST) from 15 clonal complexes (CC) was examined. Of 15 CC, 12 were represented by more than one isolate and a predominant RFLP-flaA type was found for 10 (83%). Of these, seven (70%) correctly predicted the predominant MLST CC with a probability of > 0.8. Of 40 STs detected, 19 were reported for the first time, 9 of which were represented by more than one isolate. Eight of these were represented by a single RFLP-flaA type. Only two of eight major SVR-fla types were able to predict CC with a probability of > 0.8, indicating that flaA-RFLP is a more reliable predictor of CC than SVR-fla and thus offers an alternative to MLST for use in routine surveillance. Copyright © 2007, American Society for Microbiology. All Rights Reserved.

DOI 10.1128/JCM.01012-06
Citations Scopus - 27
Co-authors John Ferguson
2006 Hope K, Durrheim DN, Tursan D'Espaignet E, Dalton CB, 'Syndromic surveillance: is it a useful tool for local outbreak detection? (Editorial)', Journal of Epidemiology and Community Health, 60 374-375 (2006) [C3]
Citations Scopus - 25Web of Science - 22
Co-authors D Durrheim
2006 Hall GV, Kirk MD, Ashbolt R, Stafford R, Lalor K, Bell R, et al., 'Frequency of infectious gastrointestinal illness in Australia, 2002: Regional, seasonal and demographic variation', Epidemiology and Infection, 134 111-118 (2006)

To estimate the frequency of infectious gastroenteritis across Australia, and to identify risk factors, we conducted a national telephone survey of 6087 randomly selected responde... [more]

To estimate the frequency of infectious gastroenteritis across Australia, and to identify risk factors, we conducted a national telephone survey of 6087 randomly selected respondents in 2001-2002. The case definition was three or more loose stools and/or two or more vomits in a 24-hour period in the last 4 weeks, with adjustment to exclude non-infectious causes and symptoms secondary to a respiratory infection. Frequency data were weighted to the Australian population. Multivariate logistic regression was used to assess potential risk factors including season, region, demographic and socioeconomic status. Among contacted individuals, 67% responded. The case definition applied to 7% of respondents (450/6087) which extrapolates to 17.2 million (95% CI 14.5-19.9 million) cases of gastroenteritis in Australia in one year, or 0.92 (95% CI 0.77-1.06) cases/ person per year. In the multivariate model, the odds of having gastroenteritis were increased in summer and in the warmest state, in young children, females, those with higher socioeconomic status and those without health insurance. © 2005 Cambridge University Press.

DOI 10.1017/S0950268805004656
Citations Scopus - 70
2006 O'Reilly LC, Inglis TJJ, Unicomb L, Adamson P, Cheung K, Dalton C, et al., 'Australian multicentre comparison of subtyping methods for the investigation of Campylobacter infection', Epidemiology and Infection, 134 768-779 (2006)

In order to identify subtyping methods able to contribute to the surveillance or investigation of Australian Campylobacter infection, six genotypic and three phenotypic subtyping ... [more]

In order to identify subtyping methods able to contribute to the surveillance or investigation of Australian Campylobacter infection, six genotypic and three phenotypic subtyping methods were evaluated on a collection of 84 clinical isolates collected over a 30-month period from one region in Australia. The aim was to compare the logistics of various subtyping methods and examine their ability to assist in finding outbreaks or common sources of sporadic infection. The genotypic subtyping methods used were sequencing of the short variable region of the flaA gene, two methods using restriction fragment length polymorphism (RFLP) of the flaA gene using either DdeI or EcoRI with PstI, automated ribotyping, pulsed field gel electrophoresis and multilocus sequence typing. The phenotypic methods employed included Laboratory of Enteric Pathogens serotyping, Lior biotyping and antibiotic resistotyping. The level of agreement between subtyping results was determined. Phenotypic methods showed little agreement whereas genotypic typing methods showed a high level of agreement. Using the premise that five of the six genotypic typing methods were in agreement 15 genotypic groupings were identified. Sequencing of the short variable region of the flaA gene, RFLP of the flaA gene or automated ribotyping in conjunction with multilocus sequence typing best identified genotypic groupings. An alternative combination of RFLP of the flaA gene followed by ribotyping was equally satisfactory. RFLP of the flaA gene appeared to be suitable as a preliminary typing method based on ease of operation, equipment availability and cost. © 2006 Cambridge University Press.

DOI 10.1017/S0950268805005777
Citations Scopus - 23
Co-authors John Ferguson
2006 Monaghan K, Dalton CB, Durrheim DN, Whyte IM, 'Mercury Incident in a Boarding House: An Integrated Public Health Response in Newcastle, Australia', Environmental Health, 6 72-79 (2006) [C2]
Co-authors D Durrheim
2006 Dalton CB, 'Business continuity management and pandemic influenza.', New South Wales public health bulletin, 17 138-141 (2006)

Pandemic influenza planning presents challenges for both government and businesses. Effective cooperation and communication before and during a pandemic will help mitigate the maj... [more]

Pandemic influenza planning presents challenges for both government and businesses. Effective cooperation and communication before and during a pandemic will help mitigate the major threats to societal function. The major challenges for government include communicating a realistic estimate of pandemic risk, managing community anxiety, communicating the need for rationing of vaccines and antiviral medications, setting standards for preparedness, and gaining the trust of essential service workers. For businesses the challenges are tailoring generic planning guides to local use, and making links with local and regional partners in pandemic planning.

Citations Scopus - 3
2006 Willmore A, Sladden T, Bates L, Dalton CB, 'Use of a geographic information system to track smelter-related lead exposures in children: North Lake Macquarie, Australia, 1991-2002', International Journal of Health Geographics, 5 (2006) [C1]
DOI 10.1186/1476-072X-5-30
Citations Scopus - 12
2005 Ashbolt R, Barralet J, Bell R, Bittisnich D, Black A, Combs B, et al., 'OzFoodNet: enhancing foodborne disease surveillance across Australia: quarterly report, October to December 2004.', Communicable diseases intelligence, 29 85-88 (2005)
Citations Scopus - 1
2005 Unicomb LE, Simmons G, Merritt T, Gregory J, Nicol C, Jelfs P, et al., 'Sesame Seed Products Contaminated with Salmonella: Three Outbreaks Associated with Tahini', Epidemiology and Infection, 133 1065-1072 (2005) [C1]
DOI 10.1017/S0950268805004085
Citations Scopus - 38Web of Science - 36
2005 Dalton CB, Bates LI, 'Impact of Closure of a Large Lead-Zinc Smelter on Elevated Blood Levels of Children in Adjacent Suburbs, Boolaroo, Australia', Transactions on Ecology and the Environment (Environmental Exposure and Health), 85 377-387 (2005) [C3]
Citations Web of Science - 7
2004 Dalton C, 'Foodborne disease surveillance in NSW: moving towards performance standards.', New South Wales public health bulletin, 15 2-5 (2004)
2004 Dalton CB, Gregory J, Kirk MD, Stafford RJ, Kraa E, Gould D, 'Foodborne disease outbreaks in Australia, 1995-2000', Communicable Diseases Intelligence, 28 211-224 (2004) [C1]
Citations Scopus - 54
2003 Sharma H, Unicomb L, Forbes W, Djordjevic S, Valcanis M, Dalton C, Ferguson J, 'Antibiotic resistance in Campylobacter jejuni isolated from humans in the Hunter Region, New South Wales.', Commun Dis Intell Q Rep, 27 Suppl S80-S88 (2003)
2003 Unicomb L, Bird P, Dalton C, 'Outbreak of Salmonella Potsdam associated with salad dressing at a restaurant.', Communicable diseases intelligence, 27 508-512 (2003)

Between 27 January and 7 February 2002, 12 cases of Salmonella Potsdam infection were notified to NSW Health of which nine were residents of the Hunter Health Area. Interviews wit... [more]

Between 27 January and 7 February 2002, 12 cases of Salmonella Potsdam infection were notified to NSW Health of which nine were residents of the Hunter Health Area. Interviews with two cases notified by two local doctors initiated the investigation and revealed exposure to foods from the same restaurant (restaurant A). All New South Wales S. Potsdam cases, those accompanying cases to restaurant A and people from restaurant A booking lists were interviewed. Of the 34 people interviewed, 17 met the case definition. The epidemiological investigation did not detect a food source of S. Potsdam infection, however, shell egg-based Caesar salad dressing and mayonnaise, and a swab of a cap from a mayonnaise bottle collected at restaurant A tested positive for S. Potsdam. Environmental and laying hen feed samples from the egg supplier to restaurant A and meat meal, (the major component of laying hen feed) tested positive for various Salmonella serotypes. The investigation identified problems of inadequate cleaning, time-temperature abuse, and ignorance of the hazardous nature of raw shell eggs at the restaurant level, poor sanitation and a lack of hygiene inspections at the egg production level, and problems with cleaning, storage and lack of bacterial monitoring of final product at the animal rendering plant. Investigation of 12 notified cases of Salmonella resulted in public health interventions, which likely prevented further cases of foodborne disease due to Salmonella and other pathogens in the Hunter Health Area and elsewhere in New South Wales.

Citations Scopus - 10
2003 Bennett CM, Dalton C, Beers-Deeble M, Milazzo A, Kraa E, Davos D, et al., 'Fresh garlic: a possible vehicle for Salmonella Virchow', EPIDEMIOLOGY AND INFECTION, 131 1041-1048 (2003)
DOI 10.1017/S0950268803001158
Citations Scopus - 12Web of Science - 8
2003 Dalton C, Bird P, 'Risk assessment for the consumption of fish with elevated selenium levels.', N S W Public Health Bull, 14 174-176 (2003)
2002 Ashbolt R, Bell R, Crerar S, Dalton C, Givney R, Gregory J, et al., 'OzFoodNet: enhancing foodborne disease surveillance across Australia: quarterly report, January to March 2002.', Communicable diseases intelligence, 26 430-435 (2002)
2002 Yohannes K, Dalton CB, Halliday L, Unicomb L, Kirk M, 'An outbreak of gastrointestinal illness associated with the consumption of escolar fish', Communicable Diseases Intelligence, 26 441-445 (2002) [C1]
Citations Scopus - 12
2001 Rea MD, Dalton CB, Ebeling PW, Ferguson JK, 'Pertussis death in the Hunter region of New South Wales', MEDICAL JOURNAL OF AUSTRALIA, 175 172-173 (2001)
Co-authors John Ferguson
2000 Bennett C, Mein J, Beers M, Harvey B, Vemulpad S, Chant K, Dalton C, 'Operation Safe Haven: an evaluation of health surveillance and monitoring in an acute setting.', Communicable diseases intelligence, 24 21-26 (2000)

From May to June 1999, 3,920 ethnic Albanians from Kosovo arrived in Australia as part of Operation Safe Haven. These people were evacuated from refugee camps in the former Yugosl... [more]

From May to June 1999, 3,920 ethnic Albanians from Kosovo arrived in Australia as part of Operation Safe Haven. These people were evacuated from refugee camps in the former Yugoslav Republic of Macedonia. Initial processing in Australia occurred at East Hills Reception Centre, and accommodation for the duration of stay was provided in eight Haven Centres in five States. The arrival of a large number of refugees in a short time frame is unprecedented in Australia. A health surveillance system was developed and critical health data were collected to assess health status and needs, plan care, monitor for potential outbreaks of communicable diseases, track service use, to meet international reporting requirements and document our response to this crisis. In this article the health surveillance system is evaluated and suggestions are offered for the formulation of specific guidelines necessary for health surveillance in acute settings.

Citations Scopus - 6
2000 Dalton C, 'Unexpected beneficial effects of measles immunisation. Measles vaccination may be marker for other health seeking behaviours.', BMJ (Clinical research ed.), 320 (2000)
2000 Dalton C, 'Unexpected beneficial effects of measles immunisation - Measles vaccination may be marker for other health seeking behaviours', BRITISH MEDICAL JOURNAL, 320 938-938 (2000)
DOI 10.1136/bmj.320.7239.938
2000 Dalton C, Emerton D, Buckoke C, Finlay R, Engler T, Shann F, Aaby P, 'Unexpected beneficial effects of measles immunisation (multiple letters)', British Medical Journal, 320 938-940 (2000)
2000 Voetsch AC, Dalton CB, Crerar SK, 'Enhanced surveillance for foodborne disease in the Hunter - A model for national surveillance in Australia?', FOOD AUSTRALIA, 52 97-99 (2000)
Citations Scopus - 1Web of Science - 2
1999 Kirk MD, Dalton CB, Beers M, Cameron AS, Murray C, 'Timeliness of Salmonella notifications in South Australia', Australian and New Zealand Journal of Public Health, 23 198-200 (1999)

Objective: To evaluate the timeliness of Salmonella serotype and phage type notifications in South Australia. Method: We surveyed all notifications of Salmonella to the South Aust... [more]

Objective: To evaluate the timeliness of Salmonella serotype and phage type notifications in South Australia. Method: We surveyed all notifications of Salmonella to the South Australian Department of Human Services between July 1995 and June 1996. We entered data onto an Epi Info 6.02 database and calculated the time interval between various stages of typing notification. Results: The median time taken between collection of a faecal specimen and receipt of serotype notification was 10 days (range, 5-38), while phage type notification took a further seven days (range 0-40). The time interval between collection of a specimen and notification of a Salmonella final identity was 14 days (range 6-49). The internal mail system of the Department of Human Services delayed notification a median of two days. Environmental Health Officers supplied reports for 224 (58%) of 384 cases, 71% of which occurred before the final Salmonella isolate was known. Conclusions: We found that the internal departmental mail system delayed the notification of Salmonella. In South Australia, investigations should focus on clusters of cases of known Salmonella identity, rather than all notified cases. Implications: To improve communicable disease investigations, health agencies should evaluate the timeliness of surveillance systems and examine the feasibility of transferring laboratory data electronically.

Citations Scopus - 5
1999 Skull SA, Krause V, Dalton CB, Roberts LA, 'A retrospective search for lyssavirus in humans in the Northern Territory', Australian and New Zealand Journal of Public Health, 23 305-308 (1999)

Background: Following the 1996 discovery of a rabies-like lyssavirus in Australian flying foxes, it was unclear whether this was a new epizootic or an unrecognised, previously exi... [more]

Background: Following the 1996 discovery of a rabies-like lyssavirus in Australian flying foxes, it was unclear whether this was a new epizootic or an unrecognised, previously existing disease. Objective: To review cases of unexplained encephalitis in the Northern Territory (NT) to test available clinical specimens for lyssavirus and survey the use of diagnostic tests by clinicians. Methods: The NT hospital morbidity database was searched from January 1992 to September 1996 for all Royal Darwin Hospital (RDH) cases with an ICD-9 code encompassing encephalitis or viral meningitis. Final diagnoses were determined by hospital record review. For cases of unexplained encephalitis, we assessed the use of diagnostic tests and located clinical specimens for testing for lyssavirus-specific inclusion bodies via immunohistochemistry, immuoflourescence and reverse-transcriptase polymerase chain reaction (RT-PCR). Results: Encephalitis occurred in 34/154 (22%) cases located by the search; 53% (18/34) of encephalitis cases were unexplained. Of these, 24% had no serology performed and 47% had no blood cultures taken. Four (22%) died and two had autopsies. These were the only two cases with clinical specimens available for testing. They were negative for lyssavirus. None of the 71 cases coded as viral meningitis had unexplained encephalitis. Conclusion: There was a considerable proportion of unexplained illness among NT cases of encephalitis. Implications: Clinicians should test for lyssavirus in patients with encephalitic symptoms and a postmortem should be sought where death is unexplained. Specimens should be stored to enable testing for emerging infectious diseases.

Citations Scopus - 11
1999 Dalton CB, Mintz ED, Wells JG, Bopp CA, Tauxe RV, 'Outbreaks of enterotoxigenic Escherichia coli infection in American adults: a clinical and epidemiologic profile', EPIDEMIOLOGY AND INFECTION, 123 9-16 (1999)
DOI 10.1017/S0950268899002526
Citations Scopus - 44Web of Science - 43
1999 Skull SA, Krause V, Roberts LA, Dalton CB, 'Evaluating the potential for opportunistic vaccination in a Northern Territory hospital', JOURNAL OF PAEDIATRICS AND CHILD HEALTH, 35 472-475 (1999)
DOI 10.1046/j.1440-1754.1999.355406.x
Citations Scopus - 5Web of Science - 5
1998 Skull SA, Krause V, Dalton CB, MacKenzie B, 'Serotyping delays and implications for public health action: The Northern Territory experience of the 1996 national outbreak of Salmonella Mbandaka and a comparison with Western Australia', AUSTRALIAN AND NEW ZEALAND JOURNAL OF MEDICINE, 28 660-661 (1998)
DOI 10.1111/j.1445-5994.1998.tb00665.x
Citations Web of Science - 1
1998 Scheil W, Cameron S, Dalton C, Murray C, Wilson D, 'A South Australian Salmonella Mbandaka outbreak investigation using a database to select controls', AUSTRALIAN AND NEW ZEALAND JOURNAL OF PUBLIC HEALTH, 22 536-539 (1998)
DOI 10.1111/j.1467-842X.1998.tb01434.x
Citations Scopus - 60Web of Science - 62
1997 Burman WJ, Dalton CB, Cohn DL, Butler JRG, Reves RR, 'A cost-effectiveness analysis of directly observed therapy vs self- administered therapy for treatment of tuberculosis', Chest, 112 63-70 (1997)

Study objectives: To compare the costs and effectiveness of directly observed therapy (DOT) vs self-administered therapy (SAT) for the treatment of active tuberculosis. Design: De... [more]

Study objectives: To compare the costs and effectiveness of directly observed therapy (DOT) vs self-administered therapy (SAT) for the treatment of active tuberculosis. Design: Decision analysis. Setting: We used published rates for failure of therapy, relapse, and acquired multidrug resistance during the initial treatment of drug-susceptible tuberculosis eases using DOT or SAT. We estimated costs of tuberculosis treatment at an urban tuberculosis control program, a municipal hospital, and a hospital specializing in treating drug-resistant tuberculosis. Outcome measures: The average cost per patient to cure drug-susceptible tuberculosis, including the cost of treating failures of initial treatment. Results: The direct costs of initial therapy with DOT and SAT were similar ($1,206 vs $1,221 per patient, respectively), although DOT was more expensive when patient time costs were included. When the costs of relapse and failure were included in the model, DOT was less expensive than SAT, whether considering outpatient costs only ($1,405 vs $2,314 per patient treated), outpatient plus inpatient costs ($2,785 vs $10,529 per patient treated), or outpatient, inpatient, and patients' time costs ($3,999 vs $12,167 per patient treated). Threshold analysis demonstrated that DOT was less expensive than SAT through a wide range of cost estimates and clinical event rates. Conclusion: Despite its greater initial cost, DOT is a more cost-effective strategy than SAT because it achieves a higher cure rate after initial therapy, and thereby decreases treatment costs associated with failure of therapy and acquired drug resistance. This cost-effectiveness analysis supports the widespread implementation of DOT.

DOI 10.1378/chest.112.1.63
Citations Scopus - 75
1997 Dalton CB, Austin CC, Sobel J, Hayes PS, Bibb WF, Graves LM, et al., 'An outbreak of gastroenteritis and fever due to Listeria monocytogenes in milk', New England Journal of Medicine, 336 100-105 (1997)

Background: After an outbreak of gastroenteritis and fever among persons who attended a picnic in Illinois, chocolate milk served at the picnic was found to be contaminated with L... [more]

Background: After an outbreak of gastroenteritis and fever among persons who attended a picnic in Illinois, chocolate milk served at the picnic was found to be contaminated with Listeria monocytogenes. Methods: In investigating this outbreak, we interviewed the people who attended the picnic about what they ate and their symptoms. Surveillance for invasive listeriosis was initiated in the states that receive milk from the implicated dairy. Stool and milk samples were cultured for L. monocytogenes. Serum samples were tested for IgG antibody to listeriolysin O. Results: Forty-five persons had symptoms that met the case definition for illness due to L. monocytogenes, and cultures of stool from 11 persons yielded the organism. Illness in the week after the picnic was associated with the consumption of chocolate milk. The most common symptoms were diarrhea (present in 79 percent of the cases) and fever (72 percent). Four persons were hospitalized. The median incubation period for infection was 20 hours (range, 9 to 32), and persons who became ill had elevated levels of antibody to listeriol ysin O. Isolates from stool specimens from patients who became ill after the picnic, from sterile sites in three additional patients identified by surveillance, from the implicated chocolate milk, and from a tank drain at the dairy were all serotype 1/2b and were indistinguishable on multilocus enzyme electrophoresis, ribotyping, and DNA macrorestriction analysis. Conclusions: L. monocytogenes is a cause of gastroenteritis with fever, and sporadic cases of invasive listeriosis may be due to unrecognized outbreaks caused by contaminated food.

DOI 10.1056/NEJM199701093360204
Citations Scopus - 361
1997 Kirk M, Waddell R, Dalton C, Creaser A, Rose N, 'A prolonged outbreak of Campylobacter infection at a training facility.', Communicable diseases intelligence, 21 57-61 (1997)

Campylobacter outbreaks are rarely detected despite Campylobacter being the most common food-borne illness notified to public health authorities. We report a prolonged outbreak of... [more]

Campylobacter outbreaks are rarely detected despite Campylobacter being the most common food-borne illness notified to public health authorities. We report a prolonged outbreak of Campylobacter occurring over a three month period at a training facility. Seventy-eight cases were detected, 16 of which were confirmed Campylobacter infections. In seven affected groups of people using the facility, the attack rate ranged between 19% and 67%. An investigation of one sporting group showed that illness was associated with consumption of cucumber served at a self-serve salad bar. Six people attending the facility in other weeks also reported illness after eating only at the salad bar. Transmission of Campylobacter ceased after changes were instituted to food preparation and storage in the facility kitchen.

Citations Scopus - 13
1997 Dalton CB, McCammon JB, Hoffman RE, Baron RC, 'Blood lead levels in radiator repair workers in Colorado', Journal of Occupational and Environmental Medicine, 39 58-62 (1997)

A laboratory-based blood lead surveillance system in Colorado identified radiator repair workers as having the highest blood lead levels of all worker groups reported. A survey of... [more]

A laboratory-based blood lead surveillance system in Colorado identified radiator repair workers as having the highest blood lead levels of all worker groups reported. A survey of 42 radiator repair shops in ten locales throughout Colorado was undertaken to estimate the prevalence of workers with elevated blood lead levels > 25 ¿g/dL. The survey was designed to test the sensitivity of the surveillance system and to assess working conditions and practices in the radiator repair industry in Colorado. Of 63 workers, 39 (62%) had blood lead levels > 25 ¿g/dL. The sensitivity of the surveillance system for detecting radiator repair workers with elevated blood lead levels was estimated at 11%. None of the radiator repair shops had adequate local exhaust ventilation. Work practice and engineering modifications are needed to reduce lead exposure in this industry.

DOI 10.1097/00043764-199701000-00011
Citations Scopus - 6
1997 Dalton C, 'Commentary. An outbreak of Norwalk virus gastroenteritis following consumption of oysters.', Communicable diseases intelligence, 21 321-322 (1997)
Citations Scopus - 1
1996 Dalton CB, Haddix A, Hoffman RE, Mast EE, 'The cost of a food-borne outbreak of hepatitis A in Denver, Colo', Archives of Internal Medicine, 156 1013-1016 (1996)

Background: In 1992, a food-borne outbreak of hepatitis A associated with a catering facility in Denver, Colo, resulted in 43 secondary cases of hepatitis A and the potential expo... [more]

Background: In 1992, a food-borne outbreak of hepatitis A associated with a catering facility in Denver, Colo, resulted in 43 secondary cases of hepatitis A and the potential exposure of approximately 5000 patrons. Objectives: To assess (1) disease control costs, including state and local health department personnel costs, provision and administration of immune globulin, and cost of extra hepatitis A serologic tests performed; (2) business losses; and (3) cost of the cases' illnesses. Methods: Cost data were collected from hospitals, health maintenance organizations, health departments, laboratories, the caterer's insurance company, and the catering facility involved in the outbreak. Results: The total costs assessed in the outbreak from a societal perspective were $809 706. Disease control costs were $689 314, which included $450 397 for 16 293 immune globulin injections and $105 699 for 2777 hours of health department personnel time. The cases' medical costs were $46 064, or 7% of the disease control costs. Conclusions: The cases' medical costs and productivity losses were only a minor component of the total cost of this outbreak. The high cost of food-borne outbreaks should be taken into account in economic analyses of the vaccination of food handlers with inactivated hepatitis A vaccine.

DOI 10.1001/archinte.156.9.1013
Citations Scopus - 69
1996 Crerar SK, Dalton CB, Longbottom HM, Kraa E, 'Foodborne disease: Current trends and future surveillance needs in Australia', Medical Journal of Australia, 165 672-675 (1996)

Review of 128 outbreaks of foodborne disease (affecting almost 6,000 people, with six deaths) between 1980 and 1995 and available surveillance data showed that foodborne disease i... [more]

Review of 128 outbreaks of foodborne disease (affecting almost 6,000 people, with six deaths) between 1980 and 1995 and available surveillance data showed that foodborne disease in Australia is similar to that in other industrialised countries. Campylobacter spp. and nontyphoidal Salmonella spp. were, the most commonly reported pathogens. However, Australia, unlike the UK and US, lacks a comprehensive national surveillance system for foodborne diseases. This is essential to improve control of these diseases.

Citations Scopus - 33
1996 Dalton CB, Douglas RM, 'Great expectations: The coroner's report on the South Australian haemolytic-uraemic syndrome outbreak', Medical Journal of Australia, 164 175-177 (1996)
Citations Scopus - 6
1995 Zeitz PS, Butler JC, Cheek JE, Samuel MC, Childs JE, Shands LA, et al., 'A case-control study of hantavirus pulmonary syndrome during an outbreak in the Southwestern United States', Journal of Infectious Diseases, 171 864-870 (1995)

In May 1993, an outbreak of hantavirus pulmonary syndrome (HPS) occurred in the southwestern United States. A case-control study determined risk factors for HPS. Seventeen case-pa... [more]

In May 1993, an outbreak of hantavirus pulmonary syndrome (HPS) occurred in the southwestern United States. A case-control study determined risk factors for HPS. Seventeen case-patients were compared with 3 groups of controls: members of case-patient households (household controls), members of neighboring households (near controls), and members of randomly selected households =24 km away (far controls). Investigators trapped more small rodents at case households than at near (P =.03) or far control households (P =.02). After the number of small rodents was controlled for, case-patients were more likely than household controls to hand plow (odds ratio [OR], 12.3; 95% confidence interval [CI] , 1.1¿143.0) or to clean feed storage areas (OR, 33.4; 95% CI, 1.7¿666.0). Case¿patients were more likely than near controls to plant (OR, 6.2; 95% CI, 1.1¿34.0) and more likely than far controls to clean animal sheds (OR, 11.9; 95% CI, 1.4¿103.0). Peridomestic cleaning, agricultural activities, and an increased number of small rodents at the household were associated with HPS. © 1995, by The University of Chicago.

DOI 10.1093/infdis/171.4.864
Citations Scopus - 95
1995 Dalton C, Hoffman R, Pape J, 'Iguana¿associated salmonellosis in children', Pediatric Infectious Disease Journal, 14 319-320 (1995)
Citations Scopus - 35
1995 Moolenaar RL, Dalton C, Lipman HB, Umland ET, Gallaher M, Duchin JS, et al., 'Clinical features that differentiate hantavirus pulmonary syndrome from three other acute respiratory illnesses', Clinical Infectious Diseases, 21 643-649 (1995)

To elucidate the early clinical characteristics of hantavirus pulmonary syndrome (HPS), we compared the clinical features of 24 cases of HPS with those of cases of bacteremic pneu... [more]

To elucidate the early clinical characteristics of hantavirus pulmonary syndrome (HPS), we compared the clinical features of 24 cases of HPS with those of cases of bacteremic pneumococcal pneumonia (n = 30), influenza (n = 33), or unexplained adult respiratory distress syndrome (ARDS, n = 21).On admission, patients with HPS were less likely than outpatients with influenza to have reported sore throat (OR = 0.02, P > .01) and cough (OR = 0.1, P =.01) and were less likely than patients with pneumococcal pneumonia to have lobar infiltrates detected by chest roentgenography (OR = 0, P > .01). Multivariate discriminant analysis revealed that three clinical characteristics at admission (dizziness, nausea or vomiting, and absence of cough) and three initial laboratory abnormalities (low platelet count, low serum bicarbonate level, and elevated hematocrit level) served to identify all patients with HPS and to exclude HPS in at least 80% of patients with unexplained ARDS. These findings warrant further study and should facilitate the early recognition of patients with HPS, who may benefit from early critical-care intervention. © 1995 by The University of Chicago. All rights reserved.

DOI 10.1093/clinids/21.3.643
Citations Scopus - 59
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Grants and Funding

Summary

Number of grants 2
Total funding $40,000

Click on a grant title below to expand the full details for that specific grant.


20091 grants / $25,000

Weekly online community survey for early detection of seasonal and pandemic influenza and vaccine failure$25,000

Funding body: Hunter Medical Research Institute

Funding body Hunter Medical Research Institute
Project Team Doctor Craig Dalton, Conjoint Professor David Durrheim, Dr Edouard Tursan d'Espaignet, Associate Professor Heath Kelly
Scheme Project Grant
Role Lead
Funding Start 2009
Funding Finish 2009
GNo G0189799
Type Of Funding Contract - Aust Non Government
Category 3AFC
UON Y

20041 grants / $15,000

Psychological and social monitoring of Hunter environmental change.$15,000

Funding body: University of Newcastle

Funding body University of Newcastle
Project Team Associate Professor Nick Higginbotham, Professor Linda Connor, Conjoint Professor Glenn Albrecht, Conjoint Professor Wayne Smith, Doctor Craig Dalton
Scheme Project Grant
Role Investigator
Funding Start 2004
Funding Finish 2004
GNo G0183538
Type Of Funding Internal
Category INTE
UON Y
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News

Keeping track of the flu keeps the nation on track

May 13, 2016

Fever, coughs and fatigue have a major impact on our nation’s health and productivity: last year 20,000 people who participated in an online FluTracking program took a combined total of 33,754 days off work or normal duties due to fever and cough symptoms (that’s a staggering total of 92.4 years!)

Flu season

Make your mark on national flu map

April 29, 2015

When you're feeling under the weather it's usually good manners to keep your germs to yourself, but a national surveillance system is encouraging the community to share their symptoms this flu season.

Flu season

Share your flu symptoms

June 2, 2014

A record 17,000 people are sharing their flu symptoms each week for good through a growing online health surveillance system designed to alert health officials to epidemic outbreaks of the potentially life-threatening disease.

Manflu myth

Newcastle researchers question existence of manflu

May 7, 2013

Men are popularly maligned for wilting like cheap supermarket flowers at the first winter sniffle, however data from Flutracking.net, Australia's online influenza-like illness surveillance system, raises questions about the existence of Manflu.

Dr Craig Dalton

Position

Conjoint Associate Professor
School of Medicine and Public Health
Faculty of Health and Medicine

Contact Details

Email craig.dalton@newcastle.edu.au
Phone (02) 4924 6345

Office

Location Callaghan
University Drive
Callaghan, NSW 2308
Australia
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