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Veterinary Pathology, Vol 22, Issue 6 592-597, Copyright © 1985 by American College of Veterinary Pathologists

ARTICLES

Pathology of spontaneous colibacillosis in a broiler flock

K. Nakamura, M. Maeda, Y. Imada, T. Imada and K. Sato

Forty-eight of 134 chickens collected from a flock on a broiler farm were diagnosed pathologically and microbiologically to have colibacillosis. Both acute septicemia (seven birds, 1 to 36 days old) and subacute serositis (41 birds, 5 to 57 days old) were found. The former consisted of necrosis with fibrinous exudates in the ellipsoids and lymphoid follicles of the spleen, and fibrinous thrombi in sinusoids of the liver with occasional necrosis of hepatic cells. The latter had fibrinopurulent inflammation with granulomatous changes in the serosal tissues--including the epicardium, pericardium, and hepatic peritoneal sac--accompanied by septicemic lesions in the spleen and liver. Respiratory lesions (airsacculitis, pneumonia, and tracheitis) were noted in most chickens affected with acute septicemia and subacute serositis. Degenerative changes also were observed in the bursa of Fabricius.




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Copyright © 1985 by the American College of Veterinary Pathologists.