EPIDEMIOLOGICAL-STUDY OF YERSINIA ENTEROCOLITICA AND YERSINIA PSEUDOTUBERCULOSIS INFECTIONS IN SHIMANE PREFECTURE, JAPAN

  • 1 January 1985
    • journal article
    • research article
    • Vol. 180  (5-6) , 515-527
Abstract
In Shimane Prefecture, Japan, 175 Y. enterocolitica isolates from 6479 stools and 347 appendixes of patients were separated into biotype 3B (VP-, sorbose-, inositol-) serotype O3 phage type II (22 isolates); biotype 4 (84 isolates), biotype 4 (ornithine-) (16 isolates) and biotype 4 (maltose-) (9 isolates) of serotype O3 phage type VIII, biotype 2 serotype O9 (1 isolate) and biotype 1 (43 isolates). This may be the 1st documentation of isolation of Y. enterocolitica biotype 3B serotype O3 phage type II from patients. Y. pseudotuberculosis isolates (23) from stools of 23 patients were grouped into serotypeIB (13 isolates), III (2 isolates) and IVB (8 isolates). Clinical manifestations were more numerous in Y. pseudotuberculosis infections than Y. enterocolitica O3 infections. Y. enterocolitica O3 was more frequently isolated between summer and autumn but Y. pseudotuberculosis and Y. enterocolitica biotype 1 were isolated between winter and spring. Secondary infection with Yersinia among close family members was frequent. Y. enterocolitica O3 and Y. pseudotuberculosis infected persons excreted 104-109 viable cells/g stools during 27 and 19 days, but Y. enterocolitica biotype 1 strains were detected only when using enrichment techniques. Serological responses were not observed in children < 1 yr old infected with Y. enterocolitica O3.

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