Rev 10/20/2025
Hyostrongylus (Hassall & Styles, 1889) Hall, 1921
Type species of the genus: Hyostrongylus rubidus (Hassall & Styles, 1889) Hall, 1921
Synonyms:
Characterized by:
Ref: Snyder et al., 2020
Male:
Female:
5-9 mm long
Vulva 1.3-1.7 mm anterior to anus, inm posterior 25% of body
Eggs 60-76 x 31-38 um containng an L1 when deposited
..
A parasite of swine worldwide
Swine
Food Sources and Feeding strategies for the genus Hyostrongylus
Parasites of gastro-intestinal system;
Life cucle direct and monmoxenous with microbivorous juvenile stages, typical of Trichostronglyloidea.
Eggs, produced by females feeding in host intestine, are passed through host feces and hatch in the fecal pat The first stage larvae (L1) feed on soil and fecal bacteria. Two subsequent molts to L2 and L3 are completed between 24 and 36 hours.
The infective L3 larvae do not feed and are enclosed in a sheath composed of the retained L2 cuticle. They migrate from the fecal pat into grasses, where they develop and become infectious in 1 to 6 weeks.
In the host, the L3 larvae exsheath, move into mucosa of the small intestine, and undergo the third and fourth molts to L4 and L5 larvae. When sexually mature adults mate. Ferilized females produce eggs, and the cycle repeats (Albrechtova et al., 2020).
Anthelminthics
Albrechtova, M., Langrova, I., Vadlech, J., Spakulova, M. 2020. A revised checklist of nematodes (Trichostrogyloidea), common parasites of wild and domestic ruminants. Helminthologia 57: 280-287.
Snyder, D.E., Marchiondo, A.A. Cruthers, L.R. 2020. Nematoda, Trichostrongyloidea. Chapter 2 in Marchiondo, Cruthers and Fourie (eds) Parasiticide Screening Vol 2. Academic Press
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