仅在蚤类跑出啮齿宿主时才向人类传播。
It usually spreads to humans only when the flea runs out of rodent hosts.
蚤类群落的种多度分布服从对数正态分布。
The species abundance distribution of fleas conformed to the lognormal distribution pattern.
经蚤类叮咬所致的间接传播是染疫啮齿动物与人之间最常见的传播方式。
Indirect transmission through the bite of a flea is the most common route of transmission between plague-infected rodents and humans.
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