Researchers thought the bacterium would infect fleas on rats, and when the rats died, the fleas would jump to humans, infecting them. Rats are also thought to be responsible for spreading more recent ...

Warning: This article contains images of bug bites as well as fleas, bed bugs, spiders, ticks, and other insects on humans. Bed bug bites Bed bugs are small insects that commonly live in the ...

Chances are, if you're wondering about cat fleas on humans, you've noticed a few small bright red spots running up and down ...