CN: 15-68
Species: Ruminant, Bovine
Specimen:
Heart
Shown:
Valvular and mural endocarditis caused by Histophilus somni
Pathology:
Endocarditis
- Generally bacterial in cause, but may be parasitic or mycotic
- Lesions primarily on found on the valves
- Mitral valve most commonly affected in most species
- In cattle, the tricuspid valve is most commonly affected.
Gross Appearance:
Irregular yellow-red or yellow-gray vegetations on the valve leaflets, with underlying ulcerations
Clinical Signs:
Pyrexia, lameness, cardiac murmurs, death
References:
Jubb, Kennedy and Palmer's Pathology of Domestic Animals
Etiology:
Histophilus somni
Clinical Manifestations:
Arthritis, pleuritis, pericarditis, myocarditis and meningoencephalitis
Pneumonia: Cranioventral fibrinous bronchopneumonia with foci of coagulative necrosis
Meningoencephalitis: Multiple foci of hemorrhage and necrosis
Hallmark:
Vasculitis with secondary thrombosis
References:
Jubb, Kennedy and Palmer's Pathology of Domestic Animals
