Japanese Journal of Veterinary Research;Volume 8, Number 1-4

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AN OUTBREAK OF HEMOLYTIC-STREPTOCOCCAL INFECTION AMONG CHICKENS OF A FLOCK : II. CHARACTERS OF THE ISOLATED STREPTOCOCCI

SATO, Gihei;MIURA, Shiro;USHIJIMA, Junichi

Permalink : http://hdl.handle.net/2115/4687
JaLCDOI : 10.14943/jjvr.8.1-4.285

Abstract

The hemolytic streptococci derived from diseased adult chickens of a small flock (56 birds), 11% of which died of septicemia were identified as Str. zooepidemicus. Mice and rabbits were susceptible to the streptococci, but guinea pigs were refractory. The half of adult chickens injected with broth culture of the organisms died of septicemia generally in chronic form. The chickens infected experimentally indicated histopathological findings (bronchitis, pneumonia and parenphymatous degeneration) similar to those of the natural cases. The most important species of chicken hemolytic streptococci was discussed. The authors wish to express their gratitude to Dr. TAKAMATSU of the Nippon Institute of Biological Science in Tokyo for his great help in examination for infectious bronchitis. The authors are indebted to Prof. YAMAGIWA for his kind advice in the pathological study and also to Assistant Prof. SHIMIZU of this faculty for his help in the serological study.

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