Alright, as a quick recap, leptospira is a genus of tiny spiral gram-negative bacteria that can be seen under a darkfield microscope.

得！快速回顾一下：钩端螺旋体是一种细小的革兰氏阴性菌，它可以在暗视野显微镜中被观察到。

Now, Leptospira is a tiny spiral bacteria, that stains poorly with Gram staining, because it doesn't retain the Gram dyes well, so it's classically considered gram-negative.

钩端螺旋体是一种细小的螺旋形病菌，革兰氏染色效果较差，因为它不能很好地保留染色剂，所以通常认为它是一种革兰氏阴性菌。

So Leptospira is a genus of spiral bacteria known to cause leptospirosis, a zoonotic infection, meaning it can be transmitted from animals such as rodents, to humans; especially people who work in sewers and waters contaminated by these animals' urine.

所以，钩端螺旋体是一种可导致钩端螺旋体病的螺旋形细菌种属；钩端螺旋体病是一种人畜共通传染病，即可以从诸如啮齿类动物传染至人类的疾病，特别是在排水系统、或被动物尿液污染的水源区工作的人群更易感染。