Pathological Studies of Enteritis In pekin Ducks at Sharkia province

Ninety Pekin ducks with aged raging between 1 week to 15 months suffering from the symptoms of diarrhea ’were collected from different farmsat Sharkia Province. These ducks were submitted to bacterial, parasitological and histopathological examinations for the identification ofthe different types of enteritis.The parasitological examination of these ducks revealed no parasites1I1 all cases. The bacteriological examination declared the presence ofSalmonella typhimurium in 35 ducks (38%), Pasteurella multocida in 19cases (21%), E. coli in 14 cases (15%). Moreover, mixed infection of E.coli and Salmonella typhimurium were detected in 10 cases (11 %) and E.coli with Proteous vulgaris infection were detected in 2 cases (2%). Tencases (11 %) of the examined ducks showed no bacterial isolates.This work revealed different types of enteritis in ducks which weredue to different bacterial isolates. The correlative histopathological changes of the internal organs which were associated with each type of infection were fully described.Necrotic enteritis was revealed in the major number of examined ducks 29 cases (32%) and the bacterial isolates in these cases were Salmonella typhimurium, Pasteurella mltocida, and mixed infection of E.coli with Salmonella typhimurium, in addition to 3 cases of no bacterialisolates. The histopathological findings of necrotic enteritis werecoagulative necrosis of the epithelial cell lining of the villi, disappearance of the mucosal layer of the intestine which were replaced with eosinophilic