The cat flea is small, about two millimeters, reddish in color, with a slightly flattened shape. After reaching maturity, the female flea lays after feeding several eggs in the fur of cats, in the places where cats sleep and in any other place where cats live. The eggs are small - 0.5 mm, white and oval. A larva hatches from the egg, also white, without wings but covered with fur. The larva does not suck blood, but eats organic substances near the cats. Then it develops into a pupa and from it – into a mature blood-sucking ndivid. Although fleas feed from cats and dogs, they are often moved to people also, causing discomfort.

The pathogenic importance of the flea is shown in several ways - as parasite it sucks blood from the human and through a saliva secretion causes itching, restlessness and local skin irritation. Fleas are carrier and distributor of pestivirus bacteria. Therein lies the most dangerous their role. Source of plague infection are usually diseased rats.