Felicola subrostratus

(Burmeister, 1838)

cat biting louse

Felicola subrostratus is a chewing ( ) and the only louse known to infest domestic cats. It is an obligate with strict for felids. cause characterized by pruritus, dermatitis, and alopecia, though some cats remain asymptomatic. Long-haired cats typically experience more severe clinical signs. Despite a broad geographic distribution spanning multiple continents, field reports indicate it is uncommon in pet cats and occurs more frequently in stray, shelter, or cattery .

Felicola subrostris by Uwe Gille. Used under a CC BY-SA 3.0 license.

Felicola subrostratus Fourrure by Fourrure. Used under a CC BY-SA 2.0 license.

Pronunciation

How to pronounce Felicola subrostratus: //fɛˈlɪkoʊlə sʌbroʊˈstreɪtəs//

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

Definitive identification requires microscopic examination of collected hair . Very high for felids facilitates field recognition—no other is known to infest domestic cats. Differentiation from other (, ) is based on morphological features visible under magnification: dorsoventrally flattened body, short , and distinct from of blood-feeding .

Images

Appearance

As a member of , F. subrostratus has a dorsoventrally flattened body adapted for moving through fur. Chewing possess broad, short with mouthparts for consuming host epidermal debris. The is microscopic and requires examination of collected hair for positive identification.

Habitat

Strictly associated with the pelage of living felids; requires direct contact for survival. Most commonly reported in multi-cat environments including catteries, shelters, and stray cat .

Distribution

Documented from Europe, Africa, Asia (temperate and tropical regions), Australasia, and South America. Specific locality records include Igarassu (Pernambuco), Campina Grande (Paraíba), and Quatis (Rio de Janeiro) in Brazil.

Diet

Feeds on epidermal debris, skin secretions, and hair fragments from the 's coat; does not consume blood.

Host Associations

Felis catus - obligate domestic cat; sole affecting this
Felidae - obligate strict at level

Life Cycle

with , , and stages. Eggs (nits) are attached to hair shafts. Field studies indicate that no reinfestation from hatching eggs was observed within 30 days post-treatment, suggesting egg-to-adult development occurs within this timeframe or that eggs were eliminated by treatment.

Behavior

Permanently resides on ; transmission requires direct contact between cats. Causes intense pruritus leading to self-trauma, trichorrhexia (hair shaft fracturing), and secondary behavioral changes including irritability. Long-haired cats are most severely affected, likely due to favorable microhabitat conditions in dense pelage.

Ecological Role

of felids with no known role beyond - interaction. Secondary bacterial may develop at sites of self-inflicted trauma from pruritus.

Human Relevance

Veterinary significance as cause of feline . Zoonotic potential is absent—strict precludes human . Effective treatments include topical fipronil, esafoxolaner-based , and combination products containing fipronil/moxidectin/praziquantel, with clinical resolution typically achieved within 7–30 days.

Similar Taxa

Notoedres catiBoth cause pruritic skin conditions in cats; N. cati is a burrowing requiring different treatment approach and microscopic differentiation.
Ctenocephalides felis of cats causing pruritus; distinguished by jumping , blood-feeding habit, and visible size difference.
Otodectes cynotisEar of cats causing otitis externa; location in ear canal and morphological features differentiate it from F. subrostratus.

More Details

Atypical clinical presentation

One documented case associated persistent diarrhea and coat deterioration without visible skin , emphasizing the need for parasitological investigation in debilitated cats even when dermatological signs are absent.

Treatment efficacy

Clinical field studies demonstrate 100% efficacy of modern ectoparasiticides against natural by day 30, with no observed reinfestation from hatching during the surveillance period.