The Leptospira genus has over 20 species, and the most common species that causes leptospirosis in humans is Leptospira interrogans.

钩端螺旋体属有超过20种亚属，其中问号钩端螺旋体（Leptospira interrogans）是导致人类钩端螺旋体病的最常见致病菌。

For example, Leptospira interrogans, the most common cause of leptospirosis, has adhesins, which are proteins that help this bacteria attach to the host's cells - usually epithelium, monocytes, and macrophages.

举个例子，最常见的致病菌问号钩端螺旋体的粘附素可以帮助细菌粘附在宿主细胞表面，通常是表皮细胞、单核细胞以及巨噬细胞的表面。