The clinical and Pathological features of experimental Mannheimia Hemolytica A2 infectionin West African Dwarf Goats.

Mannheimiosis due to Mannheimia hemolytica was experimental y induced in 15 six -month-old West african dwarf goats by intratracheal inoculation of 1 x 109 colony-forming units of four hour log-phase Mannheimia hemolytica serotype A:2 with five goats serving as controls. The clinical signs were observed and two goats were euthanized at predeterminedintervals for bacteriological and pathological investigations on tissues col ected using standard techniques. The clinical signs in order of manifestation were anorexia, pyrexia, dyspnea, nasal discharge, recumbency and death. The prominent lesions observed at necropsy were pulmonary congestion and edema with consolidation and pleural adhesionsof the apical lobes, fibrinous pleurisy as wel as, petechial and ecchymotic hemorrhages of skeletal muscles. The average percentage lung consolidation for the infection was 10.0% with no significant sex variation (P>0.05) and the right lung was more affected (p0,05) et le poumon droit était le plus touché (