Special Veterinary Pathology

Infectious thrombo-embolic-meningo-encephalitis of cattle

INFECTIOUS THROMBO - EMBOLIC  MENINGIO ENCEPHALITIS OF CATTLE

• Caused by Haemophilus somnus
• Normal inhabitant of nasal cavities, prepuce ,female genital tract of healthy cattle
• The course of disease is rapid without clinical signs fever, weakness, staggering, somnolence, ataxia, blindness and paralysis. Sometimes pneumonia and arthritis
• Mortality rate is very high
• Characteristic lesions are multiple areas of necrosis and haemorhages in brain
• Microscopically, vasculitis, thrombosis and infarction; meningitis with fibrin opurulent exudate