Uncinaria stenocephala

Uncinaria stenocephala Northern Dog Hookworm	Contents	Rev 10/21/2025
	Classification	Biology and Ecology
	Morphology and Anatomy	Life Cycle
Return to Uncinaria menu		Ecosystem Functions and Services
	Distribution	Management
Return to Ancylostomidae Menu	Feeding	References
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Classification

Phylum: Nematoda
Class: Chromadorea
Order: Rhabditida

Superfamily: Ancylostomatoidea

Family: Ancylostomidae

Uncinaria stenocephala Railliet, 1884

Morphology and Anatomy:

Buccal cavity has cutting plates

Males:

Length 3-7 mm
Bursa present
Spicules 730-960 um long

Females:

Length 3-12 mm,
Eggs 62 x 38 um

Ref: Marchiondo et al., 2020

Reported median body size for this species (Length mm; width micrometers; weight micrograms) - Click:

Distribution:

Occurs in temperate and subarctic areas of north and south hemispheres in dogs, cats, foxes, wolves and related carnivores (Marchiondo et al., 2020).

Hosts:

Uncinaria stenocephala is a parasite of dogs, cats, foxes, wolves and related carnivores

Feeding:

In the third quartewr of the small intestine

Life Cycle:

Definitive hosts are dogs, cats and foxes. Lifecycle is direct.

Definitive hosts pass eggs (70-90 x 40-50 um) in the feces. Eggs hatch and a free-living microbivore stage develops in fecal pat and soil to the infective L3 stage. Definitive hosts ingest infective L3 larvae (500-580 um length). Larvae mature to adults in the small intestine dvrlop to adults. which produce eggs.

Transmission does not occur by mammary or placental transfer.

The prepatent period is 13-21 days (Marchiondo et al., 2020).

For Ecophysiological Parameters for this species, click	If species level data are not available, click for genus level parameters