病院の水道システムに関連したレジオネール病. 継続的な高塩素化に関する5年間の進捗報告
C M Helms1, R M Massanari, R P Wenzel
1Department of Internal Medicine, University of Iowa College of Medicine, Iowa City.
JAMA
|April 22, 1988
まとめ
継続的な高塩素化による制御された疫病性ノソコミアル・レギオネロシス (NOSOCOMIAL LEGIONELLOSIS) を血液腫瘍科で診察した. しかし,レジオネラ肺炎菌の血清群1感染の散発的な症例は,未確認の環境貯水池とともに継続しました.
科学分野:
- 感染症 感染症は感染症です.
- 環境衛生 環境衛生 環境衛生
- 病院疫学 病院疫学について
背景:
- ノソコミアル・レギオネロシスの流行は,医療環境において,特に免疫不全の患者集団において,重大なリスクをもたらします.
- レジオネラ肺炎菌の血清群1は,新しい血液病腫瘍学部内の初期発生の病原体として特定されました.
- 水分配給システムは,最初の発生の環境貯蔵庫として関与していました.
研究 の 目的:
- ノソコミアル・レジオネロシス発生の制御における継続的なハイパークロリネーションの有効性を評価する.
- 病院の水道システムにおけるレジオネラ菌の汚染に対するハイパー塩素化の長期的な影響を評価する.
- ハイパークロリネーションの実施後の散発的なレギオネロシス症例の発生を調査する.
主な方法:
- モノクローナル抗体のタイプ化と制限エンドヌクレアースのプラズミド分析が,株の識別に使用されました.
- 熱水・冷水システムの継続的な高塩素化が,塩素濃度3~5mg/Lで実施された.
- 水のサンプルでレジオネラ菌の存在をモニタリングし,患者の症例は時間とともに追跡されました.
主要な成果:
- 継続的な高塩素化により,レジオネラ肺炎菌1血清群の流行性菌株 (09,04) が5年以上,水道システムから排除されました.
- 別の菌株 (09,00) と関連した4例の小児性レジオネロシスは,ハイパー塩素化後,未確認の環境源で発生しました.
- 4 mg/L以上の塩素濃度でトリハロメタン (潜在的発癌物質) のレベルが上昇し,システムの腐食が増加した.
結論:
- 継続的な高塩素投与は,疫病性病院内レジオネロシスを効果的に制御したが,散発的な症例を排除することはできなかった.
- レジオネラ肺炎菌の血清群1の散発的な感染の環境貯蔵庫は未特定であり,さらなる調査が必要である.
- 継続的な高塩素化は有望であるが,トリハロメタンの増加やシステム腐食などの潜在的な副作用を持つ実験的制御技術である.
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