He said when an elephant has fleas, it is the fleas that do the jumping.

他说，当一头大象有了跳蚤，是跳蚤在跳。

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Take bubonic plague for example. The disease is most commonly transmitted to humans through flea bites, and the fleas live on rodents.

以黑死病为例。这种疾病最常通过跳蚤叮咬传染给人类，跳蚤生存在啮齿类动物上。

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But the fleas from a cat don't go after people.

可猫的跳蚤不跟人走。

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He said when an elephant has fleas it is the fleas that do the jumping.

他说当一头大象身上有了跳蚤,是跳蚤而非大象在跳。

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The Yersinia pestis bacterium that is behind the plague is found mainly in rodents, particularly rats, and in the fleas that feed on them, the U.S. National Institutes of Health website says.

CNN: London rail excavation unearths suspected 'plague pit'

The Yersinia pestis bacteria that is behind the plague is found mainly in rodents, particularly rats, and in the fleas that feed on them, the U.S. National Institutes of Health website says.

CNN: London rail excavation unearths suspected 'plague pit'

An unseasonably warm winter in most parts of the country also means that the fleas and ticks will be in full force this summer, and grooming is one more way you can regularly check your pet for issues.

CNN: Pet grooming tools for a less hairy summer