Ctenocephalides canis

(Curtis, 1826)

dog flea

Ctenocephalides canis is a in the Pulicidae that primarily infests domestic dogs and cats as an obligate blood-feeding . It is less adaptable and less widely distributed than the closely related (C. felis), infesting fewer species and achieving lower in most regions. The species has been documented across Europe, Asia, Africa, the Americas, and Central Asia, with notable in Ireland, Austria, Greece, Poland, New Zealand, Brazil, and Uzbekistan. It serves as a for parasitic worms and can cause allergic dermatitis in pets.

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Pronunciation

How to pronounce Ctenocephalides canis: /ˌktɛnoʊˌsɛfəˈlaɪdiːz ˈkeɪnɪs/

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

Identification

Distinguished from C. felis by shape, genal comb spine length, bristle number on the lateral metanotal area (LMA), and bristles on the margin of the hind tibia. Geometric morphometrics of head shape and curvature provide complementary identification tools, particularly when molecular methods are unavailable. Morphological variations in chaetotaxy have historically caused misidentification; specimens should not be presumed hybrid without evidence of sympatry.

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Habitat

Nests, burrows, trails and tracks of ; indoors where colonize profusely. Off-host stages occur in host bedding, floor cracks, and carpet fibers.

Distribution

. Documented in Europe (Ireland, Austria, Greece, Poland, Spain, Denmark), Asia (Iran, Uzbekistan), Africa (South Africa), South America (Brazil: Amazonas, Bahia, Ceará, Minas Gerais, Paraná, Rio Grande do Sul, Santa Catarina, São Paulo), and Oceania (New Zealand). Commonest on dogs in Austria, Greece, Ireland, New Zealand, and Poland. Less widely distributed than C. felis in Brazil and most regions.

Diet

Obligate blood-feeding ; feed on blood. Larvae feed on organic debris including dried blood and adult in the environment.

Host Associations

  • Canis lupus familiaris - primary domestic dog
  • Felis catus - domestic cat
  • Canidae - various mammalian

Life Cycle

Complete : , larva, pupa, . Eggs laid on fall into environment. Larvae develop off-host in bedding, carpet, soil. occurs in cocoon; adults emerge when stimulated by host presence, vibration, or carbon dioxide.

Behavior

are permanent remaining on . Larvae are mobile, using mouthpart structures to crawl through environment. Less host-adaptable than C. felis; shows narrower host range and reduced in sympatric .

Ecological Role

causing direct harm through blood-feeding and irritation; intermediate for cestode including Dipylidium caninum; potential though less epidemiologically significant than C. felis in most regions.

Human Relevance

Veterinary pest causing allergic bite dermatitis in pets; household require environmental management. Management relies on , with imidacloprid remaining effective against monitored through 2017; no confirmed resistance detected in long-term studies.

Similar Taxa

  • Ctenocephalides felisMost commonly confused ; distinguished by shape, genal comb spine length, LMA bristle count, and hind tibia chaetotaxy. C. felis shows greater adaptability, broader distribution, and higher in most regions.
  • Ctenocephalides orientisOverlaps in Central Asia; distinguished by geometric morphometrics of shape and cox1 molecular markers. C. orientis distribution historically restricted to Southeast Asia, now documented in Uzbekistan.
  • Pulex irritansHuman flea found on dogs in Uzbekistan study; distinguished by morphological and molecular characters.

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