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Related Experiment Videos

Experimental trichinosis in sheep.

H J Smith1, K E Snowdon

  • 1Agriculture Canada, Health of Animals Laboratory, Sackville, New Brunswick.

Canadian Journal of Veterinary Research = Revue Canadienne De Recherche Veterinaire
|January 1, 1989
PubMed
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Sheep can be infected with Trichinella spiralis, but their aversion to muscle tissue may limit infection. Antibodies against Trichinella were detected in sheep, indicating an immune response.

Area of Science:

  • Veterinary Parasitology
  • Foodborne Zoonoses

Background:

  • Trichinella spiralis is a nematode parasite that can infect various mammals, including livestock.
  • Sheep are not considered a primary host for Trichinella, but understanding potential infections is crucial for food safety.

Purpose of the Study:

  • To investigate the susceptibility of sheep to Trichinella spiralis spiralis and Trichinella spiralis nativa infections.
  • To evaluate sheep's feeding behavior towards infected muscle tissue.
  • To assess the immune response of sheep to Trichinella infections.

Main Methods:

  • Infecting sheep with Trichinella spiralis spiralis and Trichinella spiralis nativa larvae via gavage or feeding infected muscle.
  • Observing sheep's consumption of infected muscle mixed with feed, with and without molasses.

Related Experiment Videos

  • Utilizing enzyme-linked immunosorbent assay (ELISA) to detect anti-Trichinella antibodies.

    • Main Results:

    • Trichinella spiralis spiralis established infections in sheep, with heaviest burdens in the masseter muscle.
    • Trichinella spiralis nativa showed low infectivity in sheep, even at high doses.
    • Sheep demonstrated aversion to ingesting muscle tissue, especially when not masked.
    • Anti-Trichinella antibodies were detected in sheep post-infection, indicating seroconversion.

    Conclusions:

    • Sheep susceptibility to Trichinella spiralis varies by species, with T.s. nativa being less infective.
    • Sheep's natural aversion to muscle consumption may reduce the risk of trichinellosis in this species.
    • The development of antibodies suggests an immune response in sheep, even in cases with undetectable larvae.