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Journal of Clinical Microbiology, December 1999, p. 3800-3803, Vol. 37, No. 12
Laboratory of Clinical Virology,
Received 15 March 1999/Returned for modification 7 June
1999/Accepted 8 September 1999
One hundred fourteen field isolates of the Ibaraki virus (IBAV), a
member of the epizootic hemorrhagic disease virus serotype 2 (EHDV-2),
were isolated from blood samples of affected and apparently healthy
cattle and Culicoides biting midges and from blood samples of dams and internal organs of aborted fetuses during an outbreak of
Ibaraki disease in the southern part of Japan in 1997. In this outbreak, 242 cattle showed typical symptoms of the disease, and several hundred dams had miscarriages or stillbirths. The viruses that
induced typical Ibaraki disease and reproductive problems among cattle
were identical and were antigenically closely related to but distinct
from previous isolates of IBAV and EHDV-2. The virus was considered to
be a putative agent of this outbreak. Reverse transcription-PCR based
on segment 3 of the RNA genome of EHDV-2 and restriction fragment
length polymorphism analysis of the PCR products were conducted to
compare the genomes of the viruses. The results suggested that the
virus isolated in 1997 was a variant of IBAV and might be exotic.
0095-1137/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
Identification and PCR-Restriction Fragment Length Polymorphism
Analysis of a Variant of the Ibaraki Virus from Naturally Infected
Cattle and Aborted Fetuses in Japan
*
Corresponding author. Mailing address: Laboratory of
Clinical Virology, Kyushu Research Station, National Institute of
Animal Health, 2702, Chuzan, Kagoshima 891-0105, Japan. Phone:
81-99-268-2078. Fax: 81-99-268-3088. E-mail:
ohashis{at}sat.affrc.go.jp.
Journal of Clinical Microbiology, December 1999, p. 3800-3803, Vol. 37, No. 12
0095-1137/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
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