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ProMED翻訳情報(295回) ~アラスカで発見された狂犬病のコウモリ~





Date: Fri 18 Jul 2014   Source: Newsminer.com, Associated Press (AP) report [edited]


The state health department said biologists on Prince of Wales Island last Sunday [13 Jul 2014] trapped several Keen’s myotis bats, one of which was acting more aggressively and seemed possibly sick. It was euthanized and tested for rabies. The test came back positive on Thursday [17 Jul 2014].



The 2 prior cases of confirmed rabies in bats in Alaska were in 1993 and 2006, both in Southeast [region].



Louisa Castrodale, an epidemiologist with the state, says Alaska doesn’t have a huge bat population. She says it is assumed there is bat rabies in south east Alaska but the extent is not known. She says the department wants to ensure anyone who may have been bitten by a bat doesn’t discount their possible risk of exposure.

州の疫学者のLouisa Castrodaleは、アラスカにはコウモリ個体群は多く存在しないと言っている。彼女は、コウモリの狂犬病が南東アラスカに存在すると思われるが、その範囲は知られていないと言っている。彼女は、当局がコウモリに咬まれたかもしれない人が誰でも曝露の可能性のリスクを軽視しないように望んでいる、と言っている。



[Keen’s myotis bats, _Myotis keenii_, has one of the most restricted ranges of any temperate vespertilionid bat, being found only in the coastal forests of the Pacific north west, extending as far north as south east Alaska, and reaching as far south as the state of Washington, with the bulk of its range contained in British Columbia.

Keen’s bats may make small scale movements to suitable hibernacula but do not migrate.

[キーンホオヒゲコウモリ、_Myotis keenii_は、温帯性のヒナコウモリ科のコウモリの中でも最も制限された分布域を持つ一種であり、太平洋の北西の海岸林でのみ見つかり、南東アラスカと同じくらいの北まで及び、ワシントン州の南まで到達し、その範囲の大半がブリティッシュコロンビアに含まれている。



Genetic evidence suggests that rabies is an old disease for bats in the New World. Bats from most of the estimated 41 bat species in the United States, when sampled in sufficient numbers, have been found to be infected with rabies virus. Rabies viruses recovered from bats were shown to be distinct from rabies viruses recovered from terrestrial mammals, suggesting that these viruses evolved within their bat hosts. Bat rabies viruses are genetically diverse, exhibiting mutations characteristic to each host bat species.



Transmission rarely occurs between species, and these “spillover events” generally are not perpetuated in the recipient species.



Portions of this comment were extracted from http://cid.oxfordjournals.org/content/35/6/738.short