Estimating Animal Abundance in Ground Beef Batches Assayed with Molecular Markers

Estimating animal abundance in industrial scale batches of ground meat is important for mapping meat products through the manufacturing process and for effectively tracing the finished product during a food safety recall. The processing of ground beef involves a potentially large number of animals from diverse sources in a single product batch, which produces a high heterogeneity in capture probability. In order to estimate animal abundance through DNA profiling of ground beef constituents, two parameter-based statistical models were developed for incidence data. Simulations were applied to evaluate the maximum likelihood estimate (MLE) of a joint likelihood function from multiple surveys, showing superiority in the presence of high capture heterogeneity with small sample sizes, or comparable estimation in the presence of low capture heterogeneity with a large sample size when compared to other existing models. Our model employs the full information on the pattern of the capture-recapture frequencies from multiple samples. We applied the proposed models to estimate animal abundance in six manufacturing beef batches, genotyped using 30 single nucleotide polymorphism (SNP) markers, from a large scale beef grinding facility. Results show that between 411∼1367 animals were present in six manufacturing beef batches. These estimates are informative as a reference for improving recall processes and tracing finished meat products back to source

Gender differences in disordered eating and weight dissatisfaction in Swiss adults : which factors matter?

Research results from large, national population-based studies investigating gender differences in weight dissatisfaction and disordered eating across the adult life span are still limited. Gender is a significant factor in relation to weight dissatisfaction and disordered eating. However, the reasons for gender differences in these conditions are still poorly understood. The aim of this study was to examine gender differences in weight dissatisfaction and disordered eating in the general Swiss adult population and to identify gender-specific risk factors.METHODS: The study population consisted of 18156 Swiss adults who completed the population-based Swiss Health Survey 2007. Self-reported weight dissatisfaction, disordered eating and associated risk factors were assessed. In order to examine whether determinants of weight dissatisfaction and disordered eating (dieting to lose weight, binge eating, and irregular eating) differ in men and women, multivariate logistic regressions were applied separately for women and men.RESULTS: Although more men than women were overweight, more women than men reported weight dissatisfaction. Weight category, smoking status, education, and physical activity were significantly associated with weight dissatisfaction in men and women. In women, nationality and age were also significant factors. Gender-specific risk factors such as physical activity or weight category were identified for specific disordered eating behaviours.CONCLUSIONS: The results suggest that gender specific associations between predictors and disordered eating behaviour should be considered in the development of effective prevention programs against disordered eating.Research results from large, national population-based studies investigating gender differences in weight dissatisfaction and disordered eating across the adult life span are still limited. Gender is a significant factor in relation to weight dissatisfaction and disordered eating. However, the reasons for gender differences in these conditions are still poorly understood. The aim of this study was to examine gender differences in weight dissatisfaction and disordered eating in the general Swiss adult population and to identify gender-specific risk factors

The general practitioner and the surgeon: stereotypes and medical specialties O clínico e o cirurgião: esteriótipos e especialidades médicas

OBJECTIVE: To investigate and characterize the professional stereotypes associated with general medicine and surgery among Brazilian medical residents. METHODS: A randomized sample of residents of the General Medicine and Surgery Residence Programs were interviewed and their perceptions and views of general and surgical doctors were compared. RESULTS: The general practitioner was characterized by the residents in general to be principally a sensitive and concerned doctor with a close relationship with the patient; (45%); calm, tranquil, and balanced (27%); with intellectual skills (25%); meticulous and attentive to details (23%); slow to resolve problems and make decisions (22%); and working more with probabilities and hypotheses (20%). The surgeon was considered to be practical and objective (40%); quickly resolving problems (35%); technical with manual skills (23%); omnipotent, arrogant, and domineering (23%); anxious, stressed, nervous, and temperamental (23%); and more decided, secure, and courageous (20%). Only the residents of general medicine attributed the surgeon with less knowledge of medicine and only the surgeons attributed gender characteristics to their own specialty. CONCLUSION: There was considerable similarity in the description of a typical general practitioner and surgeon among the residents in general, regardless of the specialty they had chosen. It was interesting to observe that these stereotypes persist despite the transformations in the history of medicine, i.e. the first physicians (especially regarding the valorization of knowledge) and the first surgeons, so-called "barber surgeons" in Brazil (associated with less knowledge and the performance of high-risk procedures).<br>OBJETIVOS: Investigar e caracterizar entre residentes brasileiros os estereótipos profissionais associados ao médico clínico e ao cirurgião. METODOLOGIA: uma amostra randomizada de residentes dos programas de Clínica Médica e Cirurgia foi entrevistada e suas representações a respeito das duas áreas caracterizadas e comparadas. RESULTADOS: O clínico foi representado, pelos residentes em geral, principalmente como um médico sensível, próximo e preocupado com o paciente (45%); calmo, tranqüilo e equilibrado (27%); com habilidades intelectuais (25%); detalhista e meticuloso (23%); pouco resolutivo e demorado para tomar decisões (22%); trabalha mais com probabilidades e hipóteses (20%). Já o cirurgião foi caracterizado como um médico prático e objetivo (40%); resolutivo e rápido (35%); técnico com habilidades manuais (23%); onipotente, arrogante e prepotente (23%); ansioso, estressado, nervoso, temperamental (23%), mas decidido, seguro e corajoso (20%). Somente os residentes da clínica atribuem ao cirurgião um conhecimento menor da medicina e apenas os cirurgiões atribuem características de gênero à própria especialidade. CONCLUSÃO: Houve muita semelhança na descrição do médico clínico e do médico cirurgião entre os residentes em geral, independentemente da especialidade a qual pertenciam. Interessante observar que, ainda hoje, os estereótipos do clínico e do cirurgião assemelham-se bastante, apesar das transformações ocorridas ao longo do tempo, à tradição dos antigos físicos (especialmente quanto à valorização da mente) e dos cirurgiões-barbeiros (associados a um menor conhecimento e à realização de procedimentos arriscados) na história da medicina