(respiratory disease complex, pasteurellosis, shipping fever)
Pneumonia is second in importance to diseases of the digestive tract. Pneumonia is a respiratory complex with no single agent being solely responsible for the disease. The most common bacteria isolated from respiratory infections is Pasteurella haemolytica or Pasteurella multocida or both. Affected animals become depressed and go off feed. They may cough and show some respiratory distress. Temperatures are usually over 104°F. The disease may be acute with sudden deaths or take a course of several days. Pneumonia is treated with antibiotics.