Ascarops strongylina

Ascarops strongylina	Contents	Rev 10/27/2025
Swine Stomach Worm; Thich Stomach Worm	Classification	Hosts
	Morphology and Anatomy	Life Cycle
Return to Ascarops Menu	Economic Importance	Damage
	Distribution	Management
Return to Spirocercidae Menu	Feeding	References
	Go to Nemaplex HomePage	Go to Dictionary of Terminology

Classification:

Chromadorea Chromadoria

Rhabditida

Spirurina

Spiruroidea

Spirocercidae

Ascarops strongylina (Rudolphi, 1819) Alicata & McIntosh, 1933

Morphology and Anatomy:

Mouth with two trilobed lips and an internal tooth.

	Females: Length 15-22 mm, width 390 um. Tail conical, obtuse, 215-275 um long V ulva slightly anterior to mid-body Eggs blong, thick-shelled, 34-40 x 18-22 um; embryonation of the egg occurs within the uterus of nematode in about 20 days.


Males: Length 10-15 mm 3, 300 um wide Spicules unequal (slender, slender, 2.24-2.94 mm long; right 457-619 um long) Tail rolled Cervical ala on right about 2x as wide as left.

Ref: Marchiondo and Cruthers, 2020

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

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Distribution:

Worldwide

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Feeding:

Parasite of the stomach of pigs. Wild rodents (Myospalax psilurus, Rattus rattus) have been found with infections of mature adult A. strongylina (Marchiondo and Cruthers, 2020).

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Biology and Ecology:

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Life Cycle:

Lifecycle requires an intermediate host.

In Ascarops strongylina:

Embryonated eggs shed in the feces of swine are ingestion by coprophagous beetles, particularly dung beetles, as natural intermediate hosts.
Larvae hatch and develop to L3 in about 30 days.
Pigs ingest infected dung beetles, and the L3 develop to adults in the pig stomach.
The prepatent period is 46-50 days. (Marchiondo and Cruthers, 2020).

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

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Ecosystem Functions and Services:

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Management:

Anthelminthics

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References:

Marchiondo, A.A., Cruthers, L.R. 2020. Nematoda, Spirurida. Chapter 2 in Marchiondo, Cruthers and Fourie (eds) Parasiticide Screening Vol 2. Academic Press

Ascarops strongylina

Copyright 1999 by Howard Ferris. Revised: October 27, 2025.

Copyright 1999 by Howard Ferris.
Revised: October 27, 2025.