Herd prevalence and geographic distribution of, and risk factors for, bovine paratuberculosis in Wisconsin

• DOI: 10.2460/javma.1994.204.04.636
• Publication Date: 2023-12-28T14:45:45Z
• Authors: Μ. T. Collins; D. C. Sockett; W. J. Goodger; T. A. Conrad; C. B. Thomas; D. J. Carr
• Keywords: Chi-Square Distribution; Cattle Diseases; Enzyme-Linked Immunosorbent Assay; 04 agricultural and veterinary sciences; Weaning; Antibodies, Bacterial; Housing, Animal; Sensitivity and Specificity; 0403 veterinary science; Mycobacterium avium subsp. paratuberculosis; Cross-Sectional Studies; Logistic Models; Wisconsin; ROC Curve; Risk Factors; Surveys and Questionnaires; Paratuberculosis; Prevalence; Animals; Cattle; Female; Animal Husbandry

Summary A random sample of Wisconsin dairy herds, stratified by herd size, were tested for paratuberculosis use an absorbed ELISA procedure. The was optimized overall accuracy means receiver operating characteristic curve analysis, and had a sensitivity specificity 50.9 94.9%, respectively. Herd prevalence analyzed correlation with responses to management practices questionnaire completed the owners. One hundred fifty-eight herds 4,990 cattle tested. Of these, 50% 7.29% positive test results. Calculation true from apparent indicated that 4.79% 34% serologic evidence paratuberculosis. Among 54 classified as on basis estimation, mean number 20.3%. geographic distribution results not uniform. More infected found in southern western districts than eastern district. westcentral district larger did other districts. By χ 2 only factor be significantly associated housing calves after weaning ( P = 0.03). Specifically, higher prevalence, separated into calf barns hutches rather pens cow barn more often lower prevalence. This also considered significant logistic regression analysis. Logistic analysis revealed size location farm state related