Premium
Yersinia species isolated from sheep with enterocolitis
Author(s) -
PHILBEY AW,
GLASTONBURY JRW,
LINKS IJ,
MATTHEWS LM
Publication year - 1991
Publication title -
australian veterinary journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.382
H-Index - 59
eISSN - 1751-0813
pISSN - 0005-0423
DOI - 10.1111/j.1751-0813.1991.tb00768.x
Subject(s) - flock , yersinia pseudotuberculosis , yersiniosis , yersinia enterocolitica , serotype , biology , enterocolitis , outbreak , yersinia , microbiology and biotechnology , yersinia infections , veterinary medicine , virology , medicine , virulence , enterobacteriaceae , bacteria , biochemistry , genetics , escherichia coli , gene
SUMMARY In 40 submissions to the Regional Veterinary Laboratory (RVL) Wagga Wagga from sheep in southern New South Wales from 1981 to 1989, 53 isolates of Yersinia sp were recovered from 45 sheep in 37 flocks. Of 53 isolates, 26 were identified as Y. pseudotuberculosis , 20 as Y. enterocolitica, 5 as Y. intermedia and 2 as Y. frederiksenii . Twelve isolates of Y. pseudotuberculosis tested in the slide agglutination test all belonged to serotype III. The 20 Y. enterocolitica isolates were categorised biochemically as biotype 5 strains and, of 6 isolates serotyped, all belonged to serogroup 2,3. Outbreaks of yersiniosis were most common in late winter and early spring and affected flocks often had experienced a change in husbandry. Infection with Yersinia sp was associated with diarrhoea, illthrift and mortality. At necropsy, congestion and occasionally thickening of the intestinal mucosa were observed in affected sheep. Gastrointestinal nematodiasis and coccidiosis often were concurrent findings. The characteristic histological lesion in sheep infected with Y. pseudotuberculosis was acute segmental suppurative erosive enterocolitis. There were no lesions consistently associated with Y. enterocolitica, Y. intermedia or Y. frederiksenii .