Special Veterinary Pathology

CONTAGIOUS PLEUROPNEUMONIA OF SWINE

• Caused by Haemophilus pleuropneumoniae. Endotoxins produce lesions
• Spreads through respiratory route by infected animals
• Young animals up to 6 months of age are susceptible
• Death with one day or two
• Mortality 50%
• Clinical signs include fever, respiratory distress, nasal discharge mixed with blood
• Characteristic lesions are fibrinopurulent pneumonia, fibrinous pleuritis, sequestration of lungs, meningitis and arthritis
• Microscopically, alveolar and interlobular oedema, dilation of lymphatics, congestion, haemorrhage and intravascular fibrinous thrombus