初期の梅毒では,ベンザチンペニシリンGの1用 vs 3用

Edward W Hook¹, Jodie A Dionne¹, Kimberly Workowski²

¹Department of Medicine, University of Alabama at Birmingham, Birmingham.

The New England journal of medicine

|September 3, 2025

まとめ

ベンザチンペニシリンGの単回投与は,早期の梅毒の治療に3回投与と同じくらい有効であり,6ヶ月で血清学的反応の非劣化を示しています. この発見は,早期の梅毒感染の治療プロトコルを簡素化します.

科学分野:

感染症
臨床試験
細菌学

背景:

初期の梅毒 (Treponema pallidum感染) のベンザチンペニシリンG治療の最適な持続時間については議論がある.
初期シフィリスには,主,次,および初期潜伏段階が含まれます.

研究の目的:

初期の梅毒の治療におけるベンザチンペニシリンGの単回投与と3回投与の有効性を比較する.
非劣等性試験における主要エンドポイントとして6ヶ月後の血清学的反応を評価する.

主な方法:

多センター,ランダム化,制御,非劣等性試験は,HIV感染者または未感染者による初期の梅毒患者を含む.
参加者は,ベンザチンペニシリンGの単一の240万単位量または週3回の240万単位量を投与された.
6ヶ月後の血清反応 (非反応性状態または≥2稀釋RPRタイトルの減少) が主なアウトカムでした.

主要な成果:

合計249人の参加者が登録され,61%がHIV感染者でした.
単一投与群は76%の血清反応率を達成し,三回投与群は70%であった.
どちらのグループでも臨床再発や治療失敗は認められなかった. 注射部位の痛みは一般的でした.

結論:

ベンザチンペニシリンGの単一の240万単位は,6ヶ月の早期の梅毒で血清学的反応を達成するために3つの投与量より劣らない.
この研究は,早期の梅毒の治療ガイドラインを簡素化しています.

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