| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥5,200,000)
Fiscal Year 1988: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1987: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1986: ¥2,200,000 (Direct Cost: ¥2,200,000)
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| Research Abstract |
The incidence of Yersinia Pseudotuberculosis infection from human, animals, water, and pork in Japan is presented on the basis of a review of literature and serotyping of 633 strains referred to our laboratory. Most of the strains belonged to serogroup 4B, followed in frequency of isolation by serogroups 3, 16, 5B, 5A, and the others, whereas serogroup 1A has not been detected. Although strains were isolated from 11 species of animals none were isolated from birds.
Cecal contents and mesenteric lymph nodes of wild and house rats trapped in Tottori and Okayama Prefectures from 1986 to 1988 were examined for Yersinia species of organism. Thirty one strains of Y. Pseudotuberculosis were isolated from 30 of 275 rats. No considerable difference was observed in the distribution of the organism in these districts. Isolation of Y. Pseudotuberculosis was higher in colder months however, the organism was also isolated in July. The isolates were divided into three serological types: Type 3(90.3%), Type 4b (6.5%),and Type 5A(3.2%). We considered wild and house rats have an important role in the contamination of environment with Y. Pseduo-Tuberculosis.
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