Japanese Journal of Veterinary Research;Volume 16, Number 2-3

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O GROUPS AND ANTIBIOTIC SENSITIVITY OF ESCHERICHIA COLI ISOLATED FROM DISEASED CHICKENS

TAKAHASHI, Koichi;MIURA, Shiro

Permalink : http://hdl.handle.net/2115/1900
JaLCDOI : 10.14943/jjvr.16.2-3.65

Abstract

By using Escherichia coli antisera from 45 different O groups, 157 (58.6%) of the 251 strains isolated, from diseased chickens, were classified into 17 O groups. The prevalent O groups found were O2 (54 strains, 21.5%), O78 (26,10.9%), O8 (21,8.4%) and O1 (19,7.6%) ; these strains of 4 O groups comprised 81.6% of the typable strains and 47.9% of the total 251 strains. The serotype O8 : K?(L) : H- was isolated from a chicken showing coli-granuloma like lesions. All of the 251 strains were sensitive to chloramphenicol, but 64 strains (25.5%) were resistant to tetracycline, 1 (0.4%) to streptomycin and 12 (4.8%) to both tetracycline and streptomycin.

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