Outbreak of Salmonella enterica serotype Newport in a beef cow-calf herd associated with exposure to bovine viral diarrhea virus

Journal of the American Veterinary Medical Association
Russell F Daly, Regg D Neiger

Abstract

Severe disease and death in cows and calves affected 1 of 3 separate groups (A, B, and C) of cattle on a commercial cow-calf operation. Clinical illness consisting of severe watery and bloody diarrhea, dehydration, weakness, and death affected adult cows and calves in 1 group (group B). Salmonella enterica serotype Newport was recovered from tissues of cows and calves from group B. Despite supportive and antimicrobial treatment of cattle in group B, cow mortality rate attributable to salmonellosis in that group was 7.9% (32/407); calf mortality rate was 14.4% (52/361). None of the cows in Groups A or C died, and the calf mortality rate in those groups was low. Salmonella enterica serotype Newport was recovered from pooled fecal samples subsequently collected from each group of cows. Bovine viral diarrhea virus (BVDV) antigen was identified in an ear notch sample collected from a necropsied calf from group B. Subsequently, ear notch specimens from cattle in all 3 groups were tested for BVDV antigen. A significantly higher proportion of calves persistently infected with BVDV was identified in group B (8/295 [2.7%]), compared with the proportion in groups A and C combined (1/287 [0.3%]). Outbreaks of disease attributable to Salmon...Continue Reading

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Citations

Apr 5, 2016·Transboundary and Emerging Diseases·S CiulliA Guercio
Oct 16, 2012·Preventive Veterinary Medicine·Jozef LaureynsJeroen Dewulf
Feb 24, 2015·The Veterinary Clinics of North America. Food Animal Practice·Geof Smith
Sep 13, 2019·Reproduction in Domestic Animals = Zuchthygiene·Caroline RitterMarina A G von Keyserlingk

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