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Morphological descriptions of the egg and larval stages of Trichuris suis Schrank, 1788

Published online by Cambridge University Press:  06 April 2009

R. J. S. Beer
R. J. S. Beer
Affiliation:
A.R.C. Institute for Research on Animal Diseases, Compton, Berkshire
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Extract

The egg and larval stages of Trichuris suis can be briefly characterized as follows: The egg: barrel shaped, possesses a thick shell consisting of three thick outer layers and an inner thin vitelline membrane, is operculate at each end and is unsegmented and unfertilized when freshly deposited. L. 1 within the egg: presence of an oral spear, a poorly denned oesophagus and an intestinal tract consisting of undifferentiated granulated material. L. 1 within the host: initial differentiation of an oesophagus, cell body, intestine and rectum. L. 2: further differentiation of the body organs and the appearance of the rudiments of the reproductive system. L. 3: initial development of reproductive system and development of a cloaca in the male thus distinguishing the sexes. L. 4: differentiation of reproductive system into vagina, uterus, oviduct and ovary in the female, and testis, vas deferens, ejaculatory duct, spicule and spicular muscle, sheath and tube in the male. L. 5 or adult stage: completed development of the sexual organs including formation of the vulval orifice and eggs in the female and seminal vesicle in the male.

Type
Research Article
Information
Parasitology , Volume 67 , Issue 3 , December 1973 , pp. 263 - 278
Copyright
Copyright © Cambridge University Press 1973

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References

REFERENCES

Alicata, J. E. (1935). Early developmental stages of nematodes occurring in swine. United States Department of Agriculture Technical Bulletin no. 489, 47–51.Google Scholar
Beer, R. J. S. (1973). Studies on the biology of the life-cycle of Trichuris suis Schrank, 1788. Parasitology 67, 253–262.CrossRefGoogle ScholarPubMed
Dalchow, W. (1964). Untersuchungen über die Entwicklung des Peitschenwurmes Trichuris ovis (Abilgaard, 1795). Dissertation, Berlin, 58 pp.Google Scholar
Opitz, H. M. (1963). Untersuchungen über die Entwicklung des Peitschenwurmes des Hundes Trichuris vulpis. Dissertation, Berlin, 41 pp.Google Scholar
Powers, K. G. (1961). Bionomics of the genus Trichuris Roederer 1761, in sheep. Ph.D. Thesis, University of Wisconsin, U.S.A.Google Scholar
Shlikas, A. V. & Medzyavichus, A. K., (1969). [Studies on the biology of the nematode Trichocephalus muris Schrank, 1788.] Materialy Nauchnoi Konferentsii Vsesoyuznogo Obshchestva Gelmintologov: Institit Gel'mintologii, K. I. Skryabina, Moscow.Google Scholar
Sondak, V. A. (1948). [Possible difference between human and swine whipworms]. Parazitologicheskii Sbornik 10, 197–204.Google Scholar
Thapar, G. S. & Singh, K. S. (1954). Studies on the life history of Trichuris ovis. Proceedings of the Indian Academy of Science, B 40, 69–88.Google Scholar