2025 |
Mansfield E, Cameron E, Clapham M, Hall A, Boyes A, 'Psychometric evaluation of the unmet needs instrument for carers of people with dementia (UNI-C)', Journal of Patient Reported Outcomes, 9 (2025) [C1]
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2025 |
Cameron E, Freund M, Eades S, Turner N, Davis R, Heris C, Rumbel J, Clapham M, Bryant J, 'Factors associated with not smoking among Aboriginal and Torres Strait Islander adolescents and young people: Analysis of data from the 2014 to 15 National Aboriginal and Torres Strait Islander Social Survey', HEALTH PROMOTION JOURNAL OF AUSTRALIA, 36 (2025) [C1]
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2024 |
Cameron EC, Ries N, Waller A, Johnston B, Anderson J, Bryant J, 'Advance personal planning knowledge, attitudes, and participation amongst community-dwelling older people living in regional New South Wales, Australia: A cross-sectional survey', PLOS ONE, 19 (2024) [C1]
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2023 |
Carey M, Mansfield E, Cameron E, Boyes A, Browne W, Dizon J, Sanson-Fisher R, 'Depression and thoughts of self-harm and suicide among people living with dementia: results of a cross-sectional survey', PSYCHOGERIATRICS, 23, 773-780 (2023) [C1]
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Open Research Newcastle |
2023 |
Carey M, Cameron E, Mansfield E, Sanson-Fisher R, 'Perceptions of people living with dementia regarding patient-centred aspects of their care and caregiver support', AUSTRALASIAN JOURNAL ON AGEING, 42, 246-250 (2023) [C1]
Objective: This study examined the perceptions of a sample of Australian people living with dementia regarding the person-centred care and support they received from health profes... [more]
Objective: This study examined the perceptions of a sample of Australian people living with dementia regarding the person-centred care and support they received from health professionals and family. Methods: Community-dwelling people living with dementia were invited to complete a cross-sectional survey. Results: Seventy-one people participated in the study. More than 90% agreed that health professionals explain who they are, why they are seeing them and listen to what they have to say; 63% agreed that health professionals ask how they would like to be involved in decisions about treatment; 78% agreed health professionals mainly speak to them rather than anyone accompanying them; 76% reported their family 'support you to do tasks by yourself', and 36% indicated that family caregivers 'get frustrated with you'. Conclusions: Results suggest that people living with dementia have a positive perception of the care and support they receive. Improvements may be needed in how health professionals speak directly to the person living with dementia when exploring how they would like to be involved in treatment decisions. Family caregivers may benefit from education and support on how they can manage frustrations and assist the person they support to maintain their independence.
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Open Research Newcastle |
2023 |
Cameron E, Bryant J, Cashmore A, Passmore E, Oldmeadow C, Neill S, Milat A, Mitchell J, Gatt N, Macoun E, Ioannides SJ, Murray C, 'A mixed methods evaluation of Quit for new life, a smoking cessation initiative for women having an Aboriginal baby', BMC HEALTH SERVICES RESEARCH, 23 (2023) [C1]
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Open Research Newcastle |
2023 |
Bryant J, Mansfield E, Cameron E, Sanson-Fisher R, 'Experiences and preferences for advance care planning following a diagnosis of dementia: Findings from a cross-sectional survey of carers', PLOS ONE, 18 (2023) [C1]
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Open Research Newcastle |
2023 |
Mansfield E, Cameron EC, Boyes AW, Carey ML, Nair B, Hall AE, Sanson-Fisher RW, 'Prevalence and type of unmet needs experienced by carers of people living with dementia', AGING & MENTAL HEALTH, 27, 904-910 (2023) [C1]
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Open Research Newcastle |
2023 |
Cameron E, Noble N, Bryant J, Norton G, Allanson Oam V, Sanson-Fisher R, 'Job satisfaction and regulation in the aged care sector: staff perspectives.', BMC Health Serv Res, 23 1421 (2023) [C1]
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Open Research Newcastle |
2022 |
Hobden B, Turon H, Fakes K, Cameron E, Sanson-Fisher R, 'Systems-level audit and feedback interventions to improve oncology care: a scoping review', TRANSLATIONAL BEHAVIORAL MEDICINE, 12, 654-662 (2022) [C1]
Audit and feedback is commonly used as a method of both monitoring and attempting to improve the quality of healthcare. No review has examined the literature on systems-level audi... [more]
Audit and feedback is commonly used as a method of both monitoring and attempting to improve the quality of healthcare. No review has examined the literature on systems-level audit and feedback strategies to improve the quality of oncology care. This scoping review examines the number, care focus (technical, nontechnical, or both) and methodological quality of published intervention studies which have used systems-level audit and feedback intended to improve the quality of care delivered in oncology treatment centers. Medline, Embase, PsycINFO, and the Cochrane database were searched, from inception to March 2021, for intervention studies which examined the effectiveness of systems-level audit and feedback in improving care for cancer patients. Studies which met the Effective Practice and Organization of Care (EPOC) minimum design criteria were then assessed using the EPOC risk of bias tool. Study characteristics and outcomes were extracted for those meeting methodological criteria. A narrative approach was used to synthesize the results. A total of 32 intervention studies met the inclusion criteria, of which 53% focused on technical aspects of care, 31% focused on nontechnical and 16% focused on both. Four of the included 32 studies met the EPOC minimum design criteria (13%). Most studies had a before-after study design (75%; n = 24) and methodological quality of the final four studies was moderate. Audit and feedback studies involving oncology treatment centers have primarily focused on technical care aspects. The low number and moderate methodological quality of the studies make it difficult to draw clear inferences about the effectiveness of systems-level audit and feedback. Furthermore, high-quality audit and feedback interventions are required across technical and nontechnical aspects of care to quantify the effectiveness of strategies for improving cancer care and ensure healthcare resources are being optimized.
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Open Research Newcastle |
2022 |
Mansfield E, Cameron E, Carey M, Boyes A, Nair B, Hall A, Sanson-Fisher R, 'Prevalence and Type of Unmet Needs Experienced by People Living with Dementia', JOURNAL OF ALZHEIMERS DISEASE, 87, 833-842 (2022) [C1]
Background: Accurately identifying the unmet needs of community-dwelling people with dementia allows targeted support to be provided to assist these individuals to stay at home. O... [more]
Background: Accurately identifying the unmet needs of community-dwelling people with dementia allows targeted support to be provided to assist these individuals to stay at home. Objective: We developed a self-report instrument to identify the unmet needs of community-dwelling people with dementia and used this to explore the prevalence and type of unmet needs present in this population. Methods: This was a cross-sectional survey of people with dementia living in the community in Australia. Participants were recruited from geriatric clinics, respite centers, aged care providers, and carers attending support groups. Eligible people with dementia were provided with a study information pack and survey which included the self-report Unmet Needs Instrument for Dementia (UNI-D), sociodemographic characteristics and survey acceptability. Results: The UNI-D contained 26 items across 5 domains and demonstrated acceptable internal consistency, face and construct validity, and acceptability. Ninety-five eligible participants completed the survey (response rate 35%) with 85% identifying at least one unmet need (median = 4; IQR = 1-9). The items most frequently endorsed included needing more help with remembering things (64%), finding possible treatments for dementia (44%), understanding who to contact regarding a problem or concern related to dementia (36%), and to see friends and family more often (33%). Conclusion: The UNI-D is a promising tool to identify the self-reported needs of people with dementia. The development and rigorous testing of interventions targeting unmet needs related to health and wellbeing, dementia support, and meaningful activities appears warranted.
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Open Research Newcastle |
2021 |
Popa-Baez A-D, Lee SF, Yeap HL, Westmore G, Crisp P, Li D, Catullo R, Cameron EC, Edwards OR, Taylor PW, Oakeshott JG, 'Tracing the origins of recent Queensland fruit fly incursions into South Australia, Tasmania and New Zealand', BIOLOGICAL INVASIONS, 23, 1117-1130 (2021) [C1]
Incursions of the Queensland fruit fly Bactrocera tryoni (Qfly) into areas without permanent Qfly populations present serious threats to the Australian and New Zealand horticultur... [more]
Incursions of the Queensland fruit fly Bactrocera tryoni (Qfly) into areas without permanent Qfly populations present serious threats to the Australian and New Zealand horticultural industries. Identifying the origins of recent incursions will help reduce future threats by enabling the targeting of problematic incursion routes for more stringent quarantine protocols. Here we present an analytical framework based on supervised and unsupervised machine learning to identify the origins and recent population history of incursion individuals. Our framework is based on a recently developed reference dataset of genome-wide markers for 35 Qfly populations from across the ranges of Qfly and the related taxon Bactrocera aquilonis (NTfly). We apply our framework to recent incursions into New Zealand, Tasmania and South Australia. Two distinct Qfly sources were identified for incursions into New Zealand (total 18 individuals), one from the east coast of Australia and one from New Caledonia. All eight recent incursion collections analysed (total 85 individuals) from South Australia and Tasmania most likely originated from just one of six clusters of populations in our reference database, Qfly from the east coast of Australia. None were found to originate from clusters containing NTfly or Qfly/NTfly hybrids in the Northern Territory or north Western Australia. Several, but not all, of the collections showed signals of small founding population size and two Tasmanian collections each included individuals apparently derived from three different sources within the east coast of Australia. In total, several more incursion events were detected than previously known, although some were founded by relatively few individuals.
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Open Research Newcastle |
2020 |
Popa-Baez A-D, Catullo R, Lee SF, Yeap HL, Mourant RG, Frommer M, Sved JA, Cameron EC, Edwards OR, Taylor PW, Oakeshott JG, 'Genome-wide patterns of differentiation over space and time in the Queensland fruit fly', SCIENTIFIC REPORTS, 10 (2020) [C1]
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Open Research Newcastle |
2019 |
Reeves P, Doran C, Carey M, Cameron E, Sanson-Fisher R, Macrae F, Hill D, 'Costs and Cost-Effectiveness of Targeted, Personalized Risk Information to Increase Appropriate Screening by First-Degree Relatives of People With Colorectal Cancer', HEALTH EDUCATION & BEHAVIOR, 46, 798-808 (2019) [C1]
Background. Economic evaluations are less commonly applied to implementation interventions compared to clinical interventions. The efficacy of an implementation strategy to improv... [more]
Background. Economic evaluations are less commonly applied to implementation interventions compared to clinical interventions. The efficacy of an implementation strategy to improve adherence to screening guidelines among first-degree relatives of people with colorectal cancer was recently evaluated in a randomized-controlled trial. Using these trial data, we examined the costs and cost-effectiveness of the intervention from societal and health care funder perspectives. Method. In this prospective, trial-based evaluation, mean costs, and outcomes were calculated. The primary outcome of the trial was the proportion of participants who had screening tests in the year following the intervention commensurate with their risk category. Quality-adjusted life years were included as secondary outcomes. Intervention costs were determined from trial records. Standard Australian unit costs for 2016/2017 were applied. Cost-effectiveness was assessed using the net benefit framework. Nonparametric bootstrapping was used to calculate uncertainty intervals (UIs) around the costs and the incremental net monetary benefit statistic. Results. Compared with usual care, mean health sector costs were $17 (95% UI [$14, $24]) higher for those receiving the intervention. The incremental cost-effectiveness ratio for the primary trial outcome was calculated to be $258 (95% UI [$184, $441]) per additional person appropriately screened. The significant difference in adherence to screening guidelines between the usual care and intervention groups did not translate into a mean quality-adjusted life year difference. Discussion. Providing information on both the costs and outcomes of implementation interventions is important to inform public health care investment decisions. Challenges in the application of cost¿utility analysis hampered the interpretation of results and potentially underestimated the value of the intervention. Further research in the form of a modeled extrapolation of the intermediate increased adherence effect and distributional cost-effectiveness to include equity requirements is warranted.
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Open Research Newcastle |
2019 |
Bryant J, Turon H, Mansfield E, Cameron E, Dodd N, 'Discussions About Lifestyle Risk Factors Following a Cancer Diagnosis: Findings from a Sample of Australian Cancer Outpatients', Journal of Cancer Education, 35, 1170-1176 (2019) [C1]
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Open Research Newcastle |
2019 |
Bryant J, Waller AE, Cameron EC, Sanson-Fisher RW, Hure AJ, 'Receipt of information about diet by pregnant women: A cross-sectional study', WOMEN AND BIRTH, 32, E501-E507 (2019) [C1]
Problem: Given the influence of diet on infant and maternal health outcomes, adequate knowledge about nutrition during pregnancy is critical. Aims: To examine among women receivin... [more]
Problem: Given the influence of diet on infant and maternal health outcomes, adequate knowledge about nutrition during pregnancy is critical. Aims: To examine among women receiving antenatal care the proportion who: (1) believe information about diet should be provided as part of routine antenatal care; (2) recall receiving advice about diet as part of care including: (a) when information was provided, (b) the healthcare provider who gave information, and (c) the format in which it was provided; and (3) attitudes towards information received. Methods: A cross-sectional survey was conducted with women attending a public antenatal clinic in New South Wales, Australia. Women were eligible to participate if they were: pregnant or had given birth in the previous 10 weeks; =18 years; and had at least one prior antenatal appointment for their current pregnancy. Findings: A total of 223 women (64% consent rate) participated. While the majority (86%) believed healthcare providers should be giving dietary information to pregnant women, only 63% recalled receiving information during their current pregnancy. Most often it was given by a midwife (76%). Information was initially provided in the first (52%) or second (38%) trimester, in both written and verbal form (60%). Approximately one third of participants felt overwhelmed or confused by which foods should be avoided during pregnancy. Conclusions: A third of women did not recall receiving advice about diet as part of routine antenatal care. There is a need to develop a pathway to provide women with reliable, comprehensive advice about diet early in pregnancy.
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Open Research Newcastle |
2018 |
Waller A, Bryant J, Cameron E, Galal M, Symonds I, Sanson-Fisher R, 'Screening for recommended antenatal risk factors: How long does it take?', WOMEN AND BIRTH, 31, 489-495 (2018) [C1]
Background: Detection and management of antenatal risk factors is critical for quality care. Aims: To determine (1) women's views about when they should be asked about antena... [more]
Background: Detection and management of antenatal risk factors is critical for quality care. Aims: To determine (1) women's views about when they should be asked about antenatal health factors as recommended in the Australian antenatal guidelines; and (2) the time required to provide recommended care using a clinical scenario. Methods: In Phase 1, pregnant women attending an outpatient obstetrics clinic at a public hospital were surveyed about preferred screening for antenatal risk factors during visit(s). In Phase 2, a hypothetical clinical scenario of a woman attending her first antenatal visit with a practising midwife was video-recorded to extrapolate the time taken to ask about and offer assistance to manage clinical, screening and lifestyle risk factors. Findings: Most women (96%) perceived they should be asked about each of the risk factors at least once (i.e. at first visit). Total time taken to ask about all risk factors was 52 min. More time was spent discussing clinical (11 min) than lifestyle factors (4 min). Adjusting for the estimated prevalence of each risk factor, the time taken to offer assistance was 8 min per woman. Average time required for detecting and offering assistance to manage risk factors is 60 min per average risk woman. Conclusion: Women are willing to be asked about risk factors; however this process is time-consuming. Strategies to streamline visits and prioritise recommendations so time-efficient yet comprehensive care can be delivered are needed, particularly when factors require monitoring over time and for those who may be 'at-risk' for multiple factors.
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Open Research Newcastle |
2017 |
Carey M, Sanson-Fisher R, Macrae F, Cameron E, Hill D, D'Este C, Doran C, 'Improving adherence to colorectal cancer surveillance guidelines: results of a randomised controlled trial', BMC CANCER, 17 (2017) [C1]
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Open Research Newcastle |
2017 |
Bryant J, Waller A, Cameron E, Hure A, Sanson-Fisher R, 'Diet during pregnancy: Women's knowledge of and adherence to food safety guidelines', AUSTRALIAN & NEW ZEALAND JOURNAL OF OBSTETRICS & GYNAECOLOGY, 57, 315-322 (2017) [C1]
Background: As a precaution against acquiring food-borne illnesses, guidelines recommend women avoid some foods during pregnancy. Aims: To examine among women receiving antenatal ... [more]
Background: As a precaution against acquiring food-borne illnesses, guidelines recommend women avoid some foods during pregnancy. Aims: To examine among women receiving antenatal care: (i) level of knowledge and self-reported adherence to guidelines about foods that should be avoided during pregnancy; and (ii) associated socio-demographic characteristics. Methods: Women attending a public outpatient clinic who were: pregnant or had recently given birth; 18 years or older; able to complete an English language survey with minimal assistance; and had at least one prior antenatal appointment for their current pregnancy, were asked to complete a cross-sectional survey. Results: In total 223 women (64% consent rate) participated. Knowledge of foods to avoid during pregnancy was poor, with 83% of women incorrectly identifying at least one unsafe food as safe to consume. The average knowledge score for foods to avoid during pregnancy was 7.9 (standard deviation = 3.4; median = 9; interquartile range: 6¿11; n = 218) out of a possible score of 12. Having more general practice (GP) visits for antenatal care and fewer tertiary antenatal visits were significantly associated with higher knowledge. Women with a higher number of GP visits and those receiving care in a high-risk clinic were more likely to be adherent to guidelines. Conclusions: The majority of pregnant women have poor knowledge of food avoidance guidelines and continue to consume foods that put them at risk.
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Open Research Newcastle |
2016 |
Paul CL, Cameron E, Doran C, Hill D, Macrae F, Carey ML, Sanson-Fisher RW, 'Experiences of colorectal cancer patients in the 2-years post-diagnosis and patient factors predicting poor outcome', Supportive Care in Cancer, 24 4921-4928 (2016) [C1]
Purpose: There are few recent longitudinal studies investigating the quality of life of colorectal cancer patients in the early years following diagnosis. This study aimed to (i) ... [more]
Purpose: There are few recent longitudinal studies investigating the quality of life of colorectal cancer patients in the early years following diagnosis. This study aimed to (i) compare the health status of people with colorectal cancer less than 1¿year from diagnosis with health status 1¿year later and (ii) determine the characteristics associated with a change in overall health status. Methods: The study was conducted as part of a larger trial. Participants (n = 539) were identified via the Victorian Cancer Registry in Australia, completed a computer-assisted baseline telephone interview (including the EQ-5D-3L) within 6¿12¿months of diagnosis, and mailed a survey 12¿months later. Results: At baseline, the majority of participants (55¿%) reported some problems, including difficulties in usual activities (26¿%), pain or discomfort (25¿%), anxiety or depression (23¿%) and mobility issues (15¿%). Sixty-nine percent had either an unchanged or increased health utility score from baseline to follow-up. The largest proportion reporting an increase in problems between baseline and follow-up related to pain or discomfort (18¿%). While visual analogue scale scores indicated a significantly improved health state over time overall, 32¿% reported a decreased health utility score from baseline to follow-up. Those aged over 80¿years were more likely to report a decreased health utility score compared to 60¿80-year-olds. Conclusions: A sizeable minority of patients experience ongoing problems in their daily lives and should be offered assistance in overcoming disabilities and returning to best possible functioning, particularly older patients who appear to be vulnerable to poor outcomes.
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Open Research Newcastle |
2016 |
Waller A, Bryant J, Cameron E, Galal M, Quay J, Sanson-Fisher R, 'Women's perceptions of antenatal care: Are we following guideline recommended care?', BMC Pregnancy and Childbirth, 16 (2016) [C1]
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Open Research Newcastle |
2016 |
Carey M, Sanson-Fisher R, Macrae F, Cameron E, Hill D, D'Este C, Simmons J, Doran C, 'Can a print-based intervention increase screening for first degree relatives of people with colorectal cancer? A randomised controlled trial', AUSTRALIAN AND NEW ZEALAND JOURNAL OF PUBLIC HEALTH, 40, 582-587 (2016) [C1]
Objective: To test the effectiveness of a targeted print-based intervention to improve screening adherence in first degree relatives of people with colorectal cancer (CRC). Method... [more]
Objective: To test the effectiveness of a targeted print-based intervention to improve screening adherence in first degree relatives of people with colorectal cancer (CRC). Methods: People with CRC and their adult first degree relatives were identified through a population-based cancer registry and randomly allocated as a family unit to the intervention or control condition. The control group received general information about CRC screening. The intervention group received printed advice regarding screening that was targeted to their risk level. Screening adherence was assessed at baseline and at 12 months via self report. Results: 752 (25%) index cases and 574 (34%) eligible first degree relatives consented to take part in the trial and completed baseline interviews. At 12 months, 58% of first degree relatives in the control group and 61% in the intervention group were adherent to screening guidelines (mixed effects logistic regression group by time interaction effect =2.7; 95%CI=1.2¿5.9; P=0.013). Subgroup analysis indicated that the intervention was only effective for those with the lowest risk. Conclusions: Provision of personalised risk information may have a modest effect on adherence to CRC screening recommendations among first degree relatives of people diagnosed with CRC. Implications: Improved strategies for identifying and engaging first degree relatives are needed to maximise the population impact of the intervention.
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Open Research Newcastle |
2014 |
Cameron E, Rose S, Carey M, 'Assessment of family history of colorectal cancer in primary care: Perceptions of first degree relatives of people with colorectal cancer', PATIENT EDUCATION AND COUNSELING, 94, 427-431 (2014) [C1]
Objective: First degree relatives (FDRs) of someone with colorectal cancer (CRC) are at increased risk of the disease. In this study we examine the factors associated with discuss... [more]
Objective: First degree relatives (FDRs) of someone with colorectal cancer (CRC) are at increased risk of the disease. In this study we examine the factors associated with discussing family history of CRC with a health professional. Methods: People with CRC, recruited through the population-based Victorian Cancer Registry in Australia, were asked to refer FDRs to the study. Eight hundred and nineteen FDRs completed a telephone interview. Results: Thirty-six percent of FDRs recalled ever being asked about their family history of bowel cancer by a health professional. Factors associated with having this discussion were being aged 50-60 years, having a university education, being in the potentially high risk category, being very worried about getting bowel cancer and knowing that family history increases risk through discussions with family, friends or their own education. Conclusion: Despite evidence that doctor endorsement is a key factor in the uptake of CRC screening, our study shows that the majority of FDRs do not recall being asked by a health professional about their family history. Practice implications: There is a need to identify the most appropriate method to improve rates of health professional discussion of family history with relatives of CRC patients in order to improve screening rates. © 2013 The Authors.
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Open Research Newcastle |
2013 |
Paul CL, Hall AE, Carey ML, Cameron EC, Clinton-McHarg T, 'Access to Care and Impacts of Cancer on Daily Life: Do They Differ for Metropolitan Versus Regional Hematological Cancer Survivors?', Journal of Rural Health, 29 (2013) [C1]
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Open Research Newcastle |
2013 |
Sved JA, Cameron EC, Gilchrist AS, 'Estimating Effective Population Size from Linkage Disequilibrium between Unlinked Loci: Theory and Application to Fruit Fly Outbreak Populations', PLOS ONE, 8 (2013) [C1]
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Open Research Newcastle |
2012 |
Gilchrist AS, Cameron EC, Sved JA, Meats AW, 'Genetic consequences of domestication and mass rearing of pest fruit fly bactrocera tryoni (Diptera: Tephritidae)', Journal of Economic Entomology, 105, 1051-1056 (2012) [C1]
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Open Research Newcastle |
2012 |
Carey ML, Paul CL, Mackenzie LJ, Sanson-Fisher RW, Cameron EC, 'Do cancer patients' psychosocial outcomes and perceptions of quality of care vary across radiation oncology treatment centres?', European Journal of Cancer Care, 21, 384-389 (2012) [C1]
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Open Research Newcastle |
2012 |
Carey ML, Paul CL, Cameron EC, Lynagh MC, Hall AE, Tzelepis F, 'Financial and social impact of supporting a haematological cancer survivor', European Journal of Cancer Care, 21, 169-176 (2012) [C1]
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Open Research Newcastle |
2010 |
Cameron EC, Sved JA, Gilchrist AS, 'Pest fruit fly (Diptera: Tephritidae) in northwestern Australia: One species or two?', Bulletin of Entomological Research, 100, 197-206 (2010)
Since 1985, a new and serious fruit fly pest has been reported in northwestern Australia. It has been unclear whether this pest was the supposedly benign endemic species, Bactroce... [more]
Since 1985, a new and serious fruit fly pest has been reported in northwestern Australia. It has been unclear whether this pest was the supposedly benign endemic species, Bactrocera aquilonis, or a recent introduction of the morphologically near-identical Queensland fruit fly, B. tryoni. B. tryoni is a major pest throughout eastern Australia but is isolated from the northwest region by an arid zone. In the present study, we sought to clarify the species status of these new pests using an extensive DNA microsatellite survey across the entire northwest region of Australia. Population differentiation tests and clustering analyses revealed a high degree of homogeneity within the northwest samples, suggesting that just one species is present in the region. That northwestern population showed minimal genetic differentiation from B. tryoni from Queensland (FST=0.015). Since 2000, new outbreaks of this pest fruit fly have occurred to the west of the region, and clustering analysis suggested recurrent migration from the northwest region rather than Queensland. Mitochondrial DNA sequencing also showed no evidence for the existence of a distinct species in the northwest region. We conclude that the new pest fruit fly in the northwest is the endemic population of B. aquilonis but that there is no genetic evidence supporting the separation of B. aquilonis and B. tryoni as distinct species. © 2009 Cambridge University Press.
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2010 |
Cameron EC, Wilkerson RC, Mogi M, Miyagi I, Toma T, Kim HC, Fonseca DM, 'Molecular phylogenetics of aedes japonicus, a disease vector that recently invaded western Europe, North America, and the Hawaiian Islands', Journal of Medical Entomology, 47, 527-535 (2010)
We used two mitochondrial loci (nicotinamide adenine dinucleotide dehydrogenase subunit 4 and cytochrome oxidase II) and a nuclear locus (28S-D2 spacer) for a total of 1337 bp to ... [more]
We used two mitochondrial loci (nicotinamide adenine dinucleotide dehydrogenase subunit 4 and cytochrome oxidase II) and a nuclear locus (28S-D2 spacer) for a total of 1337 bp to evaluate the relationships among the four subspecies of Aedes (Finlaya) japonicus Theobald. Ae. j. japonicus was recently introduced into the United States and has been expanding rapidly. We also included in our analysis a morphologically very closely related species, Aedes (Finlaya) koreicus Edwards, as well as three more distantly related species: Aedes (Finlaya) togoi Theobald, Aedes (Finlaya) hatorii Yamada, and Aedes (Aedimorphus) vexans Meigen. We found that the four subspecies in the Ae. japonicus complex are genetically quite distinct but seem to form a monophyletic group that surprisingly also includes Ae. koreicus, suggesting the need for a taxonomic reconsideration of the group. We also found that the two southern subspecies are more closely related to each other than to any of the remaining subspecies or to Ae. koreicus and may indicate an ancient northsouth split of the lineage. Considering the overlap between Ae. j. japonicus and Ae. koreicus, but the stronger association between Ae. koreicus and humans, we are surprised it also has not expanded from its original range. As a proactive reaction to this possibility, we designed and tested a DNA-based rapid assay to differentiate Ae. koreicus from some of the species with which it may be confused in the United States. These Aedes are putative vectors of several important viral encephalitides. © 2010 Entomological Society of America.
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2010 |
Cameron EC, Wilkerson RC, Mogi M, Miyagi I, Toma T, Kim H-C, Fonseca DM, 'Molecular Phylogenetics of Aedes japonicus, a Disease Vector That Recently Invaded Western Europe, North America, and the Hawaiian Islands', Journal of Medical Entomology, 47 527-535 (2010)
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2004 |
Cameron EC, Franck P, Oldroyd BP, 'Genetic structure of nest aggregations and drone congregations of the southeast Asian stingless bee Trigona collina', Molecular Ecology, 13, 2357-2364 (2004)
In stingless bees, sex is determined by a single complementary sex-determining locus. This method of sex determination imposes a severe cost of inbreeding because an egg fertilize... [more]
In stingless bees, sex is determined by a single complementary sex-determining locus. This method of sex determination imposes a severe cost of inbreeding because an egg fertilized by sperm carrying the same sex allele as the egg results in a sterile diploid male. To explore how reproductive strategies may be used to avoid inbreeding in stingless bees, we studied the genetic structure of a population of 27 colonies and three drone congregations of Trigona collina in Chanthaburi, Thailand. The colonies were distributed across six nest aggregations, each aggregation located in the base of a different fig tree. Genetic analysis at eight microsatellite loci showed that colonies within aggregations were not related. Samples taken from three drone congregations showed that the males were drawn from a large number of colonies (estimated to be 132 different colonies in our largest swarm). No drone had a genotype indicating that it could have originated from the colony that it was directly outside. Combined, these results suggest that movements of drones and possibly movements of reproductive swarms among colony aggregations provide two mechanisms of inbreeding avoidance.
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2004 |
Franck P, Cameron E, Good G, Rasplus JY, Oldroyd BP, 'Nest architecture and genetic differentiation in a species complex of Australian stingless bees', Molecular Ecology, 13, 2317-2331 (2004)
We investigated the taxonomic significance of nest shape and its putative role in speciation in Trigona (Heterotrigona) carbonaria and T. (H. ) hockingsi, two sibling species of s... [more]
We investigated the taxonomic significance of nest shape and its putative role in speciation in Trigona (Heterotrigona) carbonaria and T. (H. ) hockingsi, two sibling species of stingless bee species from eastern Australia. These species are primarily distinguished by their nest architecture, as in all other respects they are nearly identical. We genotyped 130 colonies from six locations in Queensland at 13 microsatellite loci together with 106 additional colonies from six other Indo-Pacific Trigona species. Whether they were present in allopatry or in sympatry, colonies that displayed the T. carbonaria or the T. hockingsi nest architecture could be unambiguously differentiated at the genetic level. However, T. hockingsi colonies were classifiable into two highly differentiated paraphyletic and geographically separate populations, one in northern and one in southern Queensland. These two populations probably belong to two distinct species, T. hockingsi and T. davenporti nov. sp. Our results suggest that nest architecture characters are relevant but not sufficient criteria to identify species in this group. Consequently, modifications of nest architecture are probably not of prime importance in the speciation process of Australian stingless bees, although nest architecture differences probably result from relatively simple mechanisms. The rare interspecific hybrid colonies detected did not display a nest with an intermediate form between T. hockingsi and T. carbonaria.
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