Detection of the New Ehrlichia Species Closely Related to Ehrlichia ewingii from Haemaphysalis longicornis in Yonaguni Island, Okinawa, Japan

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概要

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• We collected a total of 206 Haemaphysalis longicornis ticks by flagging in pastures in Yonaguni Island, Okinawa, Japan, in April 2008. Four of the 206 tick DNA samples tested were positive in a polymerase chain reaction (PCR) screening for the 16SrRNA gene of Anaplasmataceae. Partial sequences of 4 PCR products were identical to each other. Longer sequences of the 16SrRNA gene were successfully determined in 2 of the 4 tick samples, and the obtained 1,392 and 1,300 bp sequences revealed high similarity to the 16SrRNA gene sequences of the validated Ehrlichia species, including Ehrlichia ewingii, E. chaffeensis, and E. canis (98.3–98.6%). We also sequenced 1,304 bp of the groEL gene from the 2 tick samples, and found that these had the highest similarity to sequences of E. ewingii (94.0–94.4%) in the validated ehrlichial species. Based on the 16SrRNA and groEL gene sequences, the ehrlichial agents detected in this study were similar to the Ehrlichia species detected in Asia and may compose a new Ehrlichia species with other Ehrlichia species detected in Asia.

著者

• Ohashi Norio

  Laboratory Of Environmental Microbiology Institute For Environmental Sciences University Of Shizuoka

• MATSUMOTO Kotaro

  Department of Clinical Veterinary Science, Obihiro University of Agriculture and Veterinary Medicine

• Inokuma Hisashi

  Department Of Applied Veterinary Medicine Obihiro University Of Agriculture And Veterinary Medicine

• Yokoyama Naoaki

  National Research Center For Protozoan Diseases Obihiro University Of Agriculture And Veterinary Med

• TAKEUCHI Toshihiko

  Department of Applied Clinical Medicine, Obihiro University of Agriculture and Veterinary Medicine

• KATAGIRI Yoshito

  Okinawa Yaeyama Livestock Hygiene Service Center

• OOSHIRO Mamoru

  Okinawa Prefectural Institute of Animal Health

• ZAKIMI Satoshi

  Okinawa Prefectural Institute of Animal Health

• KAWAMORI Fumihiko

  Department of Microbiology, Shizuoka Institute of Environment and Hygiene

• YOKOYAMA Naoaki

  National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine

• MATSUMOTO Kotaro

  Department of Applied Clinical Medicine, Obihiro University of Agriculture and Veterinary Medicine

• OHASHI Norio

  Laboratory of Microbiology, Department of Food and Nutritional Sciences, Graduate School of Nutritional and Environmental Sciences, Global Center of Excellence Program, University of Shizuoka

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