Fleas belong to the order of Siphonacteria, insects endowed, in the adult stage, with a stinging-sucking mouthparts (siphon) and wingless (atteri). They are, therefore, hematophagous insects, whose adults need the blood of warm-blooded animals to reproduce (dogs, cats, rats, etc.). The species with which man is most often in contact are 3: the Flea of cat (Ctenocephalides felis), dog flea (Ctenocephalides canis) and rat flea (Xenopsylla cheopis). Less frequent are the human flea (Pulex irritans) and the poultry flea (Echidenofaga gallinacea).