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2005.06.08

MRSA菌はPCのキーボードで6週間生き延びる!

Asahi.comより「MRSA菌、PC表面で5日〜8週間生息

院内感染の原因として米国でも深刻視されているメチシリン耐性黄色ブドウ球菌(MRSA)が、パソコンやシーツの表面で5日〜8週間も生き延びられることが分かった。米国の民間衛生管理会社が6日、米微生物学会で発表した。
MRSAMRSAとはメチシリン耐性黄色ブドウ球菌(Methicillin-Resistannt Staphylococcus aureus)のことです。

黄色ブドウ球菌自体は弱毒性の非常にありふれた菌で、私たちの髪の毛や皮膚などによく付着しています。MRSAはこの黄色ブドウ球菌の仲間ですが、抗生物質を効きにくくする薬剤耐性の性質をもっています。そのため治療は主に患者の抵抗力が頼りとなりますが、無菌室が必要になるくらい抵抗力が低下した場合や大手術の後などでは抵抗力が弱っているため重症化するおそれがあります。

Ecolab社の研究チームはシーツや枕カバー、キーボードカバー、人口爪の表面などにMRSAを塗布して経過を観察しました。

その結果、アクリルの人口爪の表面では8週間、PCのキーボードカバーでは6週間、シーツでは5日間にわたり菌が検出され続けました。

汚染されたパソコンや人工つめを使う医療関係者を介して、入院患者に菌が運ばれる恐れもある。同社は「MRSAは様々な品物の表面で生き、人から人に広がる。医療関係者の手洗いと病院内の衛生管理を怠ってはならない」と呼びかけた。
実はうちの息子も新生児ICUでMRSAに感染しました。何事もなく無事退院できましたが、あのような厳重な管理の元でも感染するんですね。

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