PATHOLOGY

Detailed explanation-1: -Fleas are parasitic insects. Parasites live on other creatures, without killing them. The mouthparts of fleas are modified to pierce skin and suck blood. This allows fleas to live on mammals-dogs, cats, hedgehogs, rabbits, pigs, goats, foxes-and even humans, gaining nourishment from their blood.

Detailed explanation-2: -Parasitism. Some fleas (e.g., shrew fleas and rabbit fleas) are highly host-specific, whereas other species parasitize a variety of mammals. The cat flea infects not only the domestic cat but dogs, foxes, civets, mongooses, opossums, leopards, and other mammals, including humans, if its regular hosts are not available.