Comparison of Akabane virus isolated from sentinel cattle in Japan.

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Comparison of Akabane virus isolated from sentinel cattle in Japan. Abstract Text:

Yohsuke Ogawa,Toyoko Fukutomi,Keita Sugiura,Katsuaki Sugiura,Kentaro Kato,Yukinobu Tohya,Hiroomi Akashi,Yohsuke Ogawa,Toyoko Fukutomi,Keita Sugiura,Katsuaki Sugiura,Kentaro Kato,Yukinobu Tohya,Hiroomi Akashi,

Adult cows, ewes, and goats infected with Akabane virus (AKAV) of the genus Orthobunyavirus of the family Bunyaviridae do not present any clinical signs; however, in utero infections may result in abortion, premature birth, stillbirth, and congenital deformities such as arthrogryposis-hydranencephaly syndrome in cattle, sheep, and goats. In contrast, the Iriki strain, a variant of AKAV isolated from a calf with nervous signs and encephalitis, causes encephalitis in experimentally inoculated calves. Two AKAV field isolates, named Okayama2001 and Okayama2004, were isolated from blood specimens of sentinel calves and characterized by cross-neutralization testing, genetic analyses of the S and M RNA segments, and experimental intraperitoneal infection in mice. Although a genetic relationship was established between Okayama2001 and the Iriki strain, their antigenic characteristics differ. Okayama2001 was avirulent in mice, as was the OBE-1 strain, which was isolated from an aborted bovine fetus. In contrast, Okayama2004 was antigenically and genetically related to the OBE-1 strain, but was virulent in mice, similar to the Iriki strain. These results indicate that the isolates mutated antigenically or pathogenically and suggest that AKAV mutates frequently in the field. Although attenuated and inactivated vaccines have been developed for disease prevention, an outbreak may occur due to variant viruses arising from mutation.

Comparison of Akabane virus isolated from sentinel cattle in Japan. Publishing Authors By Initials

Y Ogawa,T Fukutomi,K Sugiura,K Sugiura,K Kato,Y Tohya,H Akashi,Y Ogawa,T Fukutomi,K Sugiura,K Sugiura,K Kato,Y Tohya,H Akashi,

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Comparison of Akabane virus isolated from sentinel cattle in Japan. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Veterinary microbiology

VOLUME: 124

Page Numbers: 16-24

Journal Abbreviation: Vet. Microbiol.

ISSN: 0378-1135

DAY: 27

MONTH: 03

YEAR: 2007

Comparison of Akabane virus isolated from sentinel cattle in Japan. Information

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LANGUAGE: eng

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AFFILIATION: Department of Veterinary Microbiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan.

Country: Netherlands

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MEDLINETA: Vet Microbiol

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