Campylobacter fetus subspecies fetus
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- Sporadic abortion in cows and sheep
- 10% of ovine abortions in the UK
- Enteric organism of sheep, goats and cattle; faecal-oral transmission
- Ingestion during last trimester of pregnancy causes a bacteraemia
- Bacteria reach the uterus
- Necrotic placentitis causes late abortion, still birth or weak lambs
- Sporadic abortion in cattle
- Aborted lambs may have round necrotic lesions on surface of liver
- Aborting ewes source of infection for vulnerable animals
- Up to 20% of flock may abort
- Solid immunity developed
- S layer immunodominant antigen
- Diagnosis: hepatic lesions in lambs; presence of organisms in foetal abomasum; isolation and identification
- Treatment/control: isolate aborting ewes; destroy placenta; move other ewes to clean pasture; vaccinate flock with bacterin during outbreak and prophylactically; chlortetracycline in feed in an outbreak