Trichinella spiralis

Rev:  08/31/2021


Trichinella spiralis Owen, 1835

Trichinella spiralis was discovered by James Paget and Richard Owen in 1835 in the muscles of human cadavers in London and by Joseph Leidy in 1846 in the muscles of swine in Philadelphia (Gould, 1970). Since then it has been reported from over 100 mammalian hosts. Intensive studies reveal that there is variation amonmg isolates from duifferent hosts awhich has led to the description of new species (see Trichinella menu).

Trichinella spiralis larvae encysted in pork.

Photomicrograph by Jonathan Eisenback.


The nature and function of stichocyte secretions, particularly of vertebrate parasites, is an area of continued interest in research on host-parasite relationships.

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Chitwood, B.G. 1930. The structure of the esophagus in the Trichuroidea. Journal of Parasitology 17:35-42.

De Ley, P. and Blaxter, M. 2002. Systematic position and phylogeny. Pp 1-30 in Lee, D.L. (ed.). The Biology of Nematodes. Taylor and Francis, London and NY. 635p.

Despommier, D.D. 1998. Trichinella and Toxocara. Pp597-607 in Cox, F.E.G., Kreier, J.P. and Wakelin, D. Volume 5, Parasitology in Collier, L., Balows, A. and Sussman, M. (eds.). Topley and Wilson’s Microbiology and Microbial Infections. Arnold, London.

Ferris, H. 2007. Stichosomida. McGraw-Hill Encyclopedia of Science & Technology.

Gould, S.E., 1970. History. In: Gould, S.E. (Ed.), Trichinellosis in Man and Animals. Charles C. Thomas, Springfield, IL, pp. 3–46.

Lee, D.L. 2002. Life cycles. Pp 61-72 in Lee, D.L. (ed.). The Biology of Nematodes.Taylor and Francis, London and NY. 635p.

Owen, R. 1835. Description of a microscopic entozoon infesting the muscles of the human body. Trans. Zool. Soc. London 1:315-324.

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