Japanese Journal of Veterinary Research;Volume 9, Number 3

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HEMOLYTIC ESCHERICHIA COLI FROM EDEMA DISEASE OF SWINE NEW TO JAPAN

MIURA, Shiro;SATO, Gihei;ITO, Akiharu;MIYAMAE, Takeo;MITAMURA, Hiroshi;SAKAZAKI, Riichi

Permalink : http://hdl.handle.net/2115/1756
JaLCDOI : 10.14943/jjvr.9.3.145

Abstract

Since 1957,occurrences of edema disease of swine, new to Japan, have been found in Hokaido. In the present study, a total of 30 cases of diseased pigs which died or were killed were examined bacteriologically. Among them, 29 (97%) showed dominant growth of hemolytic E. coli. Out of 29 positive cases, 23 yielded cultures of serotype O139 : K82 : H1,four O2 : Kx1 : H1,and two O115 : Kx2 : --(non-motile). These specific serotypes were found in one of 15 pigs which had recovered from edema disease, 5 of 44 normal pigs in contact with diseased animals and 8 of 62 normal pigs kept in "edema disease districts". Biochemical characteristics and pathogenicity of the organisms for mouse and rabbit were described. From the epizootiological aspects of edema disease in Hokkaido, the authors would emphasize the fact that the disease may occur enzootically in some definite environments.

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