Top 6 Extremely Dangerous Insects - Page 5 of 8

Fleas

Fleas are dangerous are directly responsible for spreading Plague that they receive from their host rats. Hence their bits are not one of those annoying little bits, but indeed are serious. Fleas contribute to the spread of Bubonic Plague. They receive it from their host rats and pass it over to humans carrying Yersinia Pestsis. Fleas feed on the blood of warm-blooded vertebrates and can easily infest animal and humans. If bitten the wound swells and leads to allergic reaction.