Journal article

Outbreaks of diarrhoea ("winter scours') in weaned Merino sheep in south-eastern Australia

KJ Stanger, H McGregor, JWA Larsen

AUSTRALIAN VETERINARY JOURNAL | WILEY | Published : 2018

Abstract

OBJECTIVE: Identify the cause of outbreaks of diarrhoea during winter that are not attributable to gastrointestinal nematodes in weaned Merino sheep in the high rainfall regions of south-eastern Australia and determine the efficacy of antimicrobials used to treat this syndrome. METHODS: We investigated 45 outbreaks on 24 farms. Faecal samples from affected animals were cultured for Yersinia, Campylobacter and Salmonella spp. Risk factors, including rainfall, temperature and worm egg count (WEC), were assessed. Yersinia spp. were identified with molecular tests and susceptibility to four antimicrobials was determined. RESULTS: Yersinia pseudotuberculosis serotype III and virulent Y. enterocol..

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