lice

1.head lice and general uncleanliness in schools.

学校里的头和普遍肮脏。

2.Several distinct rickettsiae (a parasite carried by ticks, fleas, and lice) cause a disease known as typhus in humans.All cause disease with similarities of fever, headache, and rash.

由几种不同的发疹伤寒病原体（可由壁，，子等寄生虫传播）起的疾病被人们疹伤寒。