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Clostridial myocarditis in lambs.

J R Glastonbury1, J E Searson, I J Links

  • 1New South Wales Department of Agriculture, Regional Veterinary Laboratory, Wagga Wagga.

Australian Veterinary Journal
|July 1, 1988
PubMed
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Sudden death in young sheep was linked to myocarditis during pasture growth. Clostridium chauvoei was identified as a likely cause in four of five outbreaks, indicating a significant sheep health concern.

Area of Science:

  • Veterinary Pathology
  • Sheep Diseases
  • Microbiology

Background:

  • Myocarditis outbreaks occurred in young sheep during periods of lush pasture growth after drought.
  • The clinical presentation was characterized by sudden death.

Purpose of the Study:

  • To investigate the cause of five outbreaks of myocarditis in young sheep.
  • To identify the etiological agent responsible for the observed pathology.

Main Methods:

  • Clinical and pathological examination of affected sheep.
  • Fluorescent antibody technique (FAT) on paraffin-embedded myocardial tissue.
  • Histopathological analysis of necrotizing and hemorrhagic myocarditis.

Main Results:

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  • Pathological findings included acute multifocal, locally extensive necrotizing and hemorrhagic myocarditis.
  • Clostridium chauvoei was detected in myocardial sections from 4 out of 5 outbreaks using FAT.
  • The disease occurred during late winter and spring with significant pasture regrowth.

    • Conclusions:

    • Clostridium chauvoei is implicated as the causative agent in the majority of investigated sheep myocarditis outbreaks.
    • Environmental factors, such as lush pasture post-drought, may contribute to the occurrence of the disease.
    • Prompt diagnosis and intervention are crucial for managing Clostridium chauvoei-associated myocarditis in sheep herds.