日本确认今季首例野鸟高致病性禽流感：秋田县乌鸦检出H5亚型病毒
日本秋田县11月6日宣布，在该县由利本荘市回收的2只大嘴乌鸦死体经基因检测确认感染H5亚型高致病性禽流感病毒，这是日本本季在野鸟中首次确认这类病毒。共同社等日本媒体当天报道了县方的发布。
10月30日至11月2日，由利本荘市同一带相继发现7只乌鸦死亡。县方回收其中个体并把2只送往国立环境研究所检测，结果均为高致病性禽流感阳性。日本环境省已把回收地点周边10公里划为野鸟监视重点区域、加强监测；回收地点周边3公里内有1家养鸡场，目前未确认异常。
同一天，北海道音更町回收的大天鹅与鹿儿岛县出水市采集的环境样本也检出高致病性禽流感病毒，本季野鸟相关确认合计3件。日本农林水产省已通知各都道府县与家禽业者加强生物安全防范，邻接的山形县召开了紧急会议。
（来源：秋田县政府）
Japan Confirms Season's First Wild-Bird Case of Highly Pathogenic Bird Flu in Akita Crows
Akita Prefecture announced on November 6 that genetic testing had confirmed highly pathogenic avian influenza of the H5 subtype in two dead large-billed crows collected in the city of Yurihonjo, the first confirmation of the virus in a wild bird in Japan this season, Kyodo News and other Japanese media reported.
Seven crows were found dead in the same area of Yurihonjo between October 30 and November 2. The prefecture sent two of the carcasses to the National Institute for Environmental Studies, and both tested positive for highly pathogenic avian influenza. Japan's Environment Ministry designated a 10-kilometre zone around the collection site as a priority wild-bird monitoring area. One poultry farm lies within three kilometres of the site, and no abnormalities have been confirmed there.
On the same day, a whooper swan collected in Otofuke, Hokkaido, and an environmental sample taken in Izumi, Kagoshima Prefecture, also tested positive, bringing the season's wild-bird-related confirmations to three. The Ministry of Agriculture, Forestry and Fisheries has told prefectures and poultry groups to tighten biosecurity, and neighbouring Yamagata Prefecture held an emergency meeting.
(Source: Akita Prefectural Government)
来源：秋田县政府
发布：GSM·美国（发布链接）
图片来源：图：大嘴乌鸦（资料图，摄于日本大阪市天王寺公园）。照片 CC BY-SA 4.0，经 Wikimedia Commons。 / Photo: A large-billed crow at Tennoji Park in Osaka, Japan, file photo. CC BY-SA 4.0, via Wikimedia Commons.
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