Enzootic pneumonia

From Cow
Bovine enzootic pneumonia, showing chronic suppurative pneumonia

Bovine enzootic pneumonia is an infectious respiratory disease of calves worldwide[1].

This disease is commonly seen in dairy calves at weaning, and is triggered by environmental stressors such as lack of colostral milk, parasitism, overcrowding (especially in vealer calves), etc. The resulting immunosuppression leads to secondary bacterial infectious leading to pneumonia.

The commonly isolated bacteria include Pasteurella multocida, Mycoplasma bovis and Mannheimia varigena[2].

The bacterial and viral causes of bovine enzootic pneumonia are detailed under bovine respiratory disease.

Clinical symptoms are those of acute respiratory infection, including fever, dyspnoea, coughing and nasal discharge.

Symptomatic and supportive therapy is required, including fluid and electrolyte replacement, broad-spectrum antibiotics (e.g. tilmicosin) and supplemental feeding[3].

Additional supplements can help recovery, including non-steroidal anti-inflammatory drugs (NSAIDs), bronchodilatators, secretolytics and immunostimulating drugs.


  1. Ide, PR (1970) Developments in veterinary science. The etiology of enzootic pneumonia of calves. Can Vet J 11(10):194–202
  2. Rérat M et al (2012) Bovine respiratory disease: efficacy of different prophylactic treatments in veal calves and antimicrobial resistance of isolated Pasteurellaceae. Prev Vet Med 103(4):265-273
  3. McClary DG et al (2011) Relationship of in vitro minimum inhibitory concentrations of tilmicosin against Mannheimia haemolytica and Pasteurella multocida and in vivo tilmicosin treatment outcome among calves with signs of bovine respiratory disease. J Am Vet Med Assoc 239(1):129-135