الفهرس Only 14 pages are availabe for public view
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Abstract
The aim of this study is to measure the frequency of occurence of salmonellosis in some feedlot calves farms in Egypt, and identifying the different risk factors play a role in the likelihood of perpetuation of this organism among calves on these farms provide a scientific basis for the development of practical preventive measures. The point prevalence in different farms and different localities revealed that the prevalence were 0%, 3%, 1.8%, 0%, 0%, 2.5% and 1.8% in farms A, B, C, D, E, F and G respectively, and 1.36% from Qalioubia governorate, 0.87% from Monofia governorate and 2% from Sharkia governorate. The overall individual level prevalence of bovine salmonellosis in feedlot calves farms were 1.28%. Among 7 enrolled herds, 4 (57.14%) yielded Salmonella-positive samples during the study period. Risk factors identification of bovine salmonellosis using statistical software programe one way ANOVA test revealed that the risk factors that were found to be associated with the presence of this pathogen included purchasing calves from dealers (OR. 6, 95% CI. 1.00 to 46.00 and P<0.001), herd size 100 and more (OR. 1.5, 95% CI. 0.7-7.38 and P<0.025). group housing (OR. 3.5, 95% CI. 1.00-16, P<0.02 ), dirty muddy calf floor area (OR. 2.6, 95% CI. 0.5-12.8, P<0.012), inadequate cleaning of feeding and watering utensils (OR. 3.5, 95% CI. 0.7-9.77, P<0.005), rodents in feed storage area (OR. 3.6, 95% CI. 0.7-9.52, P<0.001), presence of dogs and cats (OR. 1.5, 95% CI. 0.8-7.38, P< 0.034), lack of barn disinfection (OR. 3.38, 95% CI. 0.65-17.2, P<0.003), age of calves (OR. 7, 95% CI. 1.00-13.9, P<0.012), breeds (OR. 1.5, 95% CI. 0.7-7.18, P< 0.023), gender (OR. 1.5, 95% CI. 0.7-7.33, P< 0.034), season OR. 1.3, 95% CI. 0.65-8.00, P<0.015