4. A highly contagious tropical disease that chiefly affects children, caused by the spirochete Treponema pertenue and characterized by raspberrylike sores, especially on the hands, feet, and face.

• 雅司病一种高度传染性热带疾病，主要感染儿童，由螺旋体细弱密螺旋体引起，特征是木莓状的肿疮，多发于手、脚和脸上收藏指正