Epidemic typhus spread by the bodylouse is the most severe. it is one of the great scourges of history associated with crowded filthy conditions.
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。
2
In 2003, Mark Stoneking, a geneticist at the Max Planck Institute in Leipzig, Germany, estimated from DNA differences that the bodylouse evolved from the head louse about 107,000 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。
3
In ancient China with a lower hygienic standard, it is very common that peoples daily life is disturbed by the body parasite of louse.