Fowl cholera found in imported myna birds (Eulabes intermedia).

Abstract

Of 480 myna birds imported from Thailand in 1976, 54 birds died shortly after arrival in Japan. Bacteriological and pathological examination were carried out on seven of them. Pasteurella multocida was almost purely isolated from all the liver, heart, spleen and trachea examined. Somatic antigen of the isolants was O-5 of Namioka and Murata. Dissection revealed hyperemia of the trachea, edema of the lungs, increase of pleural fluid, and petechial or ecchymotic hemorrhages in the liver, heart and duodenum. Minute necrotic foci in the liver and bacterial clumps in the foci, pulmonary exudate and septa were found under the microscope. Severe pathogenicity of one of the isolated strains was proved by inoculation of 50-day-old broiler chickens with 10(3)-10(5) viable cells and by death within 18 hours, following the inoculation.