Association between bulk-tank milk Salmonella antibody level and high calf mortality in Danish dairy herds

摘要: Abstract Salmonella enterica ssp. Dublin is the most common serotype found in dairy sector Denmark. antibody level bulk-tank milk ( BTM ), indicative of infection herd, has been recorded regularly all Danish herds through a surveillance program since 2002. The objective this study was to investigate whether high associated with calf mortality at herd level. Other risk factors for were also investigated: breed, production type (organic vs. conventional), number animals purchased, size, and neighbor within 4.9-km radius. Data from Cattle Database including September 2007 August 2008 used. Dairy more than 20 cows included (n=4,337). Because highly right-skewed distribution many zero values, had be dichotomized analysis. Therefore, study, defined as 6.5% calves aged 1 180 d. A logistic analysis performed identify probability having mortality. following significantly mortality: level, odds ratio (OR)=2.0 (95% confidence interval=1.6–2.4), organic OR=1.4 interval=1.1–1.7) versus conventional production, breed. Purchase 8 or increased OR purchase 7 animals, which again higher compared 0 animals. only 14.3% population consisted status, estimated proportion could reduced 38.7 36.5% by eradicating cattle (i.e., attributable 2.2%). This showed that although there strong association between status mortality, problem will not solved . All other things equal, -infected would gain larger reduction control campaign. Nevertheless, individual within-herd prevalence are likely benefit, both economically regarding animal welfare, controlling pathogenic types cattle.