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Journal of Clinical Microbiology, April 1999, p. 1213-1216, Vol. 37, No. 4
0095-1137/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

Isolation of a Human Rotavirus Strain with a Super-Short RNA Pattern and a New P2 Subtype

Toyoko Nakagomi,1 Yasuo Horie,1,2 Yumi Koshimura,1 Harry B. Greenberg,3,4 and Osamu Nakagomi1,*

Department of Microbiology1 and The First Department of Internal Medicine,2 Akita University School of Medicine, Hondo, Akita 010-8543, Japan; Division of Gastroenterology, Stanford University School of Medicine, Stanford, California 943053; and Veterans Administration Medical Center, Palo Alto, California 943044

Received 20 October 1998/Returned for modification 9 December 1998/Accepted 22 December 1998

Super-short rotavirus strains that have a rearranged gene segment 11 are rarely found in humans, and only five isolates, all from Southeast Asia, have been described in the literature. We report the first isolation in Japan from an infant with severe diarrhea of a rotavirus possessing a super-short RNA pattern. This strain, designated AU19, had a G1 VP7 and is also the first isolate in Japan that possesses a P2[6] VP4. Furthermore, the P2[6] VP4 carried by AU19 was divergent in the hypervariable region of the amino acid sequence from the P2A[6] VP4s carried by asymptomatic neonatal strains or from the P2B[6] VP4 carried by porcine rotavirus strain Gottfried. Thus, AU19 is likely to represent a new VP4 subtype, which we propose to call P2C. Given the recent emergence of the P2[6] VP4s in India, Brazil, and the United States and the role of VP4 in protective immunity, further scrutiny is justified to see whether the emergence of the previously underrepresented P2[6] VP4 serotype is related to this new P2 subtype.

* Corresponding author. Mailing address: Department of Microbiology, Akita University School of Medicine, 1-1-1 Hondo, Akita 010-8543, Japan. Phone: 81-18-884-6079. Fax: 81-18-836-2607. E-mail: onakagom{at}ipc.akita-u.ac.jp.

Journal of Clinical Microbiology, April 1999, p. 1213-1216, Vol. 37, No. 4
0095-1137/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.


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