Bacteriological Studies on Pasteurella Haemolytica In Sheep In Menofia Governorate

Pasteurella haemolytica is the aetiological pathogen ofPneumonic pasteurellosis (a fibrinous, necrotic pneumonia andshipping fever in cattle, sheep and other ruminants) exertingconsiderable world wide economic impact bovine and ovineindustries. So this study was planned as an attempt to throw spot lights uponthe prevalence of P. haemolytica in Menoufia Governorate, studyingtheir culture characteristic biochemical ,serological typing and thesusceptibly of P. haemolytica isolates to various antimicrobial agentsand preparation of a suitable vaccine, evaluation of the humeralimmune response by indirect haemagglutination technique.For attending these goals 450 samples were collected from sheepa total of 200 nasopharyngeal swabs ,(100 from apparently healthyand 100 from pneumonic sheep) and a total of 250 lung samples (100from apparently healthy and 150 from pneumonic lung). P. haemolytica was isolated from nasal swabs in the percentageof 4% in healthy animals while in diseased one 32% with a totalincidence of 18%. P. haemolytica was not isolated from healthy lungswhile in diseased one 30.67% with a total incidence of 14.4%.The biochemical activities of P. haemolytica isolates in this study roved that P. haemolytica cause -haemolysis in blood agar, grow,well onto MacConkey’s media with pin colored colonies.