- Cause peritonitis in dogs and peritonitis in cattle and peritonitis in pigs
- Nocardia is involved in peritonitis and pleuritis in dogs
- Micropolyspora faeni and Thermactinomyces vulgaris in Bovine Farmers Lung
- Thermactinomyces vulgaris may cause COPD
- Actinomyces may cause granulomatous inflammation.
- E.g. Actinomyces bovis -the cause of lumpy jaw and in osteomyelitis, may extend to surrounding muscles
- Actinomyces pyogenes in osteomyelitis
- In pyothorax
- Isolated from closed cases of Poll Evil and Fistulous Withers