体虱是虱子的一种，主要是在人身体上，寄生在毛囊里面，靠吸食血液为生！
而体虱与大猩猩虱子有关系，1千3百万年前与大猩猩虱子分道扬镳。
The human pubic louse, on the other hand, is related to the gorilla louse, from which it parted company some 13 million years ago.
2003年，普朗克学院的基因学家斯通金估算体虱大概在十万七千年前于头虱分叉。
In 2003, Mark Stoneking, a geneticist at the Max Planck Institute in Leipzig, Germany, estimated from DNA differences that the body louse evolved from the head louse about 107,000 years ago.
由体虱传播的流行性斑疹伤寒是最严重的一型，为人类史上的一大灾难，与拥挤、肮脏的人们形影相随。
Epidemic typhus spread by the body louse is the most severe. it is one of the great scourges of history associated with crowded filthy conditions.
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