Biochemical properties and cultural characteristics of Escherichia coli isolated from chickens

닭에서 분리한 Escherichia coli의 생물화학적 및 배양 특성

  • Woo, Yong-ku (Veterinary Research Institute, Rural Development Administration) ;
  • Kim, Ki-seuk (Veterinary Research Institute, Rural Development Administration) ;
  • Kim, Bong-hwan (College of Veterinary Medicine, Kyungpook National University)
  • 우용구 (농촌진흥청 가축위생연구소) ;
  • 김기석 (농촌진흥청 가축위생연구소) ;
  • 김봉환 (경북대학교 수의과대학)
  • Received : 1990.08.21
  • Published : 1990.10.31

Abstract

The present study was conducted to investigate the biochemical and cultural characteristics of Escherichia coli isolates from clinically affected chickens during the period from May 1988 to June 1989. A total of 82 E coli cultures were isolated from lesions of 75 chickens with colisepticemia. Biochemical properties of E coli isolates tested were in accordance with the general classification standard; all the isolates showed positive reaction in Catalase, Indol, and Methyl-Red tests, but negative reaction in Oxidase, Urease, $V{\ddot{o}ges$-Proskauer, Citrate utility, $H_2S$, Phenylalanine diaminase, and malonate tests. And the carbohydrate fermentation rates of them were shown to be variable. of the 82 isolates, 48(58.5%) cultures produced colicin to inhibit the indicator strain of E coli.