Reduction of salmonella contamination in pork carcasses by vaccination
نویسنده
چکیده
ORAL PRESENTATIONS Discussion: Immunization with an avirulent live S choleraesuis vaccine has demonstrated consistent clinical and bacteriologic control of S choleraesuis infections in swine. Clinical signs, including febrile response, diarrhea and mortality, along with growth rate, are significantly improved (p<0.05). Pigs from one day of age and older may be safety vaccinated intranasally, or orally, via drinking water, against disease associated with S choleraesuis, and to reduce the culture prevalence and shedding of other serovars of Salmonellae (Nolan et al., 2000). Additionally, levels of the organism are effectively reduced in vaccinated, challenged pigs. Fecal shedding of S choleraesuis is significantly lower in vaccinated challenged pigs as compared to challenged control pigs. Organ culture prevalence is likewise dramatically lowered in vaccinated pigs. Vaccination at one day of age is at least as efficacious, and may offer even greater advantage over non vaccinated controls.
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