AJTMH Transactions of the Royal Society of Tropical Medicine and Hygiene
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Am. J. Trop. Med. Hyg., 69(2), 2003, pp. 151-154
Copyright © 2003 by The American Society of Tropical Medicine and Hygiene

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SHORT REPORT: A MAJOR GENOTYPE OF JAPANESE ENCEPHALITIS VIRUS CURRENTLY CIRCULATING IN JAPAN

SHAO-PING MA, YASUKO YOSHIDA, YOSHIHIRO MAKINO, MASAYUKI TADANO, TETSURO ONO, AND MASAO OGAWA
Division of Epidemiology, Department of Infectious Diseases, Oita Medical University, Oita, Japan; Department of Microbiology, Tokyo Metropolitan Research Laboratory of Public Health, Tokyo, Japan; Department of Virology, Faculty of Medicine, University of the Ryukyus, Okinawa, Japan; Oita Prefectural Institute of Health and Environment, Oita, Japan

 

ABSTRACT

A 240-nucleotide sequence of the capsid/premembrane gene region of 23 Japanese encephalitis virus (JEV) strains isolated in Tokyo and Oita, Japan was determined and phylogenetic analyses were performed. All the strains clustered into two distinct genotypes (III and I). All strains isolated before 1991 belonged to genotype III, while those isolated after 1994 belonged to genotype I. In addition, the strains of the genotype I isolated in Japan showed a close genetic relationship with those from Korea and Malaysia.

Received February 8, 2003. Accepted for publication May 12, 2003.

Acknowledgment: We thank Dr. Yoshinobu Okuno (Osaka Prefectural Institute of Public Health, Osaka, Japan) for providing one isolate of Japanese encephalitis virus (JaOArK36-91).

Authors’ addresses: Shao-Ping Ma and Yoshihiro Makino, Division of Epidemiology, Department of Infectious Diseases, Oita Medical University, Hasamamachi, Oita 879-5593, Japan. Yasuko Yoshida, Department of Microbiology, Tokyo Metropolitan Research Laboratory of Public Health, 3-24-1, Hyakunincho, Shinjukuku, Tokyo 169-0073, Japan. Masayuki Tadano, Department of Virology, Faculty of Medicine, University of the Ryukyus. 207 Uehara, Nishihara, Okinawa 903-0215, Japan. Testuro Ono and Masao Ogawa, Oita Prefectural Institute of Health and Environment, 2-51, Hougawaradai, Oita, Oita 870-0948 Japan.

Reprint requests: Shao-Ping Ma, Division of Epidemiology, Department of Infectious Diseases, Oita Medical University, Hasamamachi, Oita 879-5593, Japan, Telephone: 81-97-586-5735, Fax: 81-97-586-5739, E-mail: masp{at}oita-med.ac.jp.




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