Infection with head lice is no reflection on personal hygiene.

染上头虱并不会给个人卫生带来不好的影响。

《柯林斯英汉双解大词典》

We studied 132 children without head lice who lived in a slum in north-eastern Brazil.

针对生活在巴西东北部贫民区内的132名无头虱症的儿童开展了一项研究。

youdao

Human head lice are related genetically to lice on chimpanzees, and the two species began to diverge as humans and chimps diverged.

人类头上的虱子同黑猩猩身上的虱子有遗传学上的关联。随着人类和黑猩猩的分化，这两种虱子也开始分道扬镳。

youdao

It is used in some areas as a treatment for head lice.

VOA: special.2009.06.23

Head lice are as likely to infest a clean head as an unwashed one.

BBC: Scientists target super lice

If they know the child is going to see a head lice inspection nurse they will start daily detection combing the child's hair, hopefully.

BBC: Scientists target super lice

The ICRC will assess the conditions and decide whether shaving the detainees' heads and beards was warranted to combat head lice, as the Pentagon said.

CNN: Pentagon defends treatment of detainees