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. 2021 Nov 24;83(11):1790-1794.
doi: 10.1292/jvms.21-0395. Epub 2021 Oct 13.

A long-term observation for ecology of pathogenic Yersinia in wild rodents living in Fukushima Prefecture, Japan

Thi Hien Bui  1 , Khanh Thuan Nguyen  1   2 , Shunsuke Ikeuchi  1 , Haruka Yanagawa  1 , Yomogi Sato  1 , Thi Hong To Tran  1 , Minato Okumura  1 , Takeshi Niwa  1 , Takahide Taniguchi  1 , Hideki Hayashidani  1
Affiliations

A long-term observation for ecology of pathogenic Yersinia in wild rodents living in Fukushima Prefecture, Japan

Thi Hien Bui et al. J Vet Med Sci. .

Abstract

From 2012 to 2021, prevalence of pathogenic Yersinia in wild rodents captured in Fukushima Prefecture, Japan was investigated twice a year to clarify the ecology of this pathogen in wild rodent populations. Pathogenic Yersinia enterocolitica O8 was isolated from 13 (1.7%) of 755 wild rodents. The Y. enterocolitica O8 isolates harbored three virulent genes (ail, fyuA, and virF). This pathogen was isolated repeatedly from wild rodents in April 2015, 2016, and 2017, in June and November 2020, and in April 2021, which was 6 of 19 times of observations. All Y. enterocolitica O8 isolates showed the same PFGE patterns. These results indicated that the same clone of pathogenic Y. enterocolitica O8 has been maintained in wild rodent populations in Fukushima Prefecture. Therefore, wild rodent populations contribute substantially to the continuous transmission of Y. enterocolitica O8 and its persistence in the ecosystem. This is the first report on the isolation of pathogenic Y. enterocolitica O8 in wild rodents in Fukushima Prefecture, Japan.

Keywords: Yersinia enterocolitica O8; ecology; epidemiology; prevalence; wild rodent.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Fig. 1.
Fig. 1.
Pulsed-field gel electrophoresis (PFGE) patterns obtained from 13 Yersinia enterocolitica O8 isolates originated from wild rodents in Fukushima Prefecture, Japan by NotI enzyme. Lane M, CHEF DNA Size Standard Lambda Ladder. Lane 1 shows PFGE pattern P1 produced from YE15-29 strain isolated in 2015. Lanes 2 to 13 show PFGE pattern P2 produced from 12 strains isolated in 2015, 2016, 2017, 2020, and 2021: lanes 2–3 are isolates in 2015, coded YE15-61, and YE15-65, respectively; lanes 4–6 are isolates in 2016, coded YE16-07, YE16-14, and YE16-58, respectively; lane 7 is isolate in 2017, coded YE17-08; lanes 8–11 are isolates in 2020, coded YE20-06, YE20-07, YE20-23, and YE20-44, respectively; and lanes 12–13 are isolates in 2021, coded YE21-4 and YE21-17, respectively.
See this image and copyright information in PMC

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