Ctenocephalides felis felis

Definition

The nominate subspecies of the cat flea, a hematophagous (blood-feeding) flea in the family Pulicidae and order Siphonaptera. This subspecies is the primary ectoparasite of domestic cats (Felis catus) and is among the most common and medically significant flea species affecting companion animals worldwide. Adults are laterally compressed, wingless, and possess enlarged hind legs adapted for jumping. The subspecies distinction separates populations primarily associated with felid hosts from other Ctenocephalides felis subspecies or host-adapted populations.

Etymology

From Greek ktenos (comb) + kephale (head), referring to the characteristic comb-like ctenidia on the head; felis from Latin for cat, repeated to indicate the nominate subspecies.

Example

Veterinary clinics routinely identify Ctenocephalides felis felis on infested cats using the presence of both pronotal and genal ctenidia (combs) to distinguish it from the dog flea Ctenocephalides canis, which lacks the genal comb.

Synonyms

• cat flea (in part)
• C. f. felis

Related Terms

• Ctenocephalides felis
• Ctenocephalides canis
• Siphonaptera
• ctenidium
• flea-borne typhus
• dipylidiasis
• vector biology
• Ectoparasite

Usage Notes

The subspecific epithet felis is repeated to designate the nominate subspecies, the population first described and bearing the type specimen. In practice, many veterinary and medical entomologists use Ctenocephalides felis without subspecific designation for routine identification. The subspecies is distinguished from Ctenocephalides felis strongylus, primarily associated with wild felids and canids in parts of Africa and Asia. Host specificity is not absolute: C. f. felis will feed on dogs, humans, and other mammals, making it a significant bridge vector for zoonotic pathogens including Bartonella henselae (cat-scratch disease) and Rickettsia felis (flea-borne spotted fever).