2023年7月〜8月,ウガンダのナマインゴ地区の汚染された湖岸水によるコレラ発生
John Rek1, Daniel Orit2, Susan Waako2
1Uganda Public Health Fellowship Program, Uganda National Institute of Public Health, Kampala, Uganda. jrek@uniph.go.ug.
BMC public health
|September 2, 2025
まとめ
シグル島でのコレラ発症は,未処理の湖水消費と関連していた. 水処理と経口コレラワクチン (OCV) を含む介入は,流行を成功裏に制御しました.
科学分野:
- 流行病学
- 感染症
- 公衆衛生
背景:
- ウガンダではコレラが公衆衛生上の問題であり,毎年発生しています.
- 2023年7月24日,ナマインゴ地区のシグル島でコレラ流行が確認されました.
- 流行の範囲を評価し,原因を特定し,制御措置を導くために調査を開始した.
研究 の 目的:
- シグル島でのコレラ流行の規模を 判断するためです
- 感染源と感染経路を特定する
- 疫病管理のための証拠に基づいた介入を推奨する.
主な方法:
- 症状と検査結果に基づいた疑いのある症例と確認された症例
- 水源の記述的疫学と環境評価を実施した.
- 症例と無症状の個人を比較した対照試験を用いた.
- 国内貯水や採集地点から採取した水のサンプルを検査した.
主要な成果:
- 24人のコレラ症例が確認され,そのうち4人はVibrio cholerae 血清型O1とO139 ogawaであることが確認された.
- 感染源は 旅行者による 公共の水源の汚染だった
- 処理されていない湖水,特にセチョ村の水点Aの消費は,コレラのリスクを大幅に増加させた (aOR=4.3).
- 水処理 (aOR=0. 085) と経口コレラワクチン (OCV) の投与 (aOR=0. 16) は保護効果を示した.
結論:
- この疫病は 旅行者が "ビブリオ・コレラ"を 持ち込んだことで始まり 処理されていない湖水に 依存する地域社会によって 増幅されました
- 大規模な水処理用品の配布,OCVキャンペーンを繰り返し実施し,公衆の意識を高める取り組みは,アウトブレイクを食い止める上で極めて重要でした.
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