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Journal of Helminthology Journal of Helminthology

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Predictability of morphological gradients in the tapeworm, Hymenolepis diminuta

Published online by Cambridge University Press:  05 June 2009

P.W. Pappas
P.W. Pappas*
Affiliation:
Department of Zoology, The Ohio State University, 1735 Neil Avenue, Columbus, OH 43210, USA.
*
* Fax: 614 292 2030 E-mail: pappas.3@osu.edu
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Abstract

The strobila of an adult tapeworm represents a continual gradient of developmental stages from immature to gravid proglottids. The purpose of this study was to determine if organogenesis (as measured by the develop mental gradient) in tapeworms within a single host and among different hosts occurred at the same rates. Rats were infected with Hymenolepis diminuta and the tapeworms were recovered 20 days post-infection. The total number of proglottids in each worm was determined, and five “benchmarks” of organogenesis were quantified. The data demonstrated that organogenesis in worms from a single host occurred at a relatively constant rate, but that rates in tapeworms from different hosts were different.

Type
Research Papers
Information
Journal of Helminthology , Volume 72 , Issue 1 , March 1998 , pp. 55 - 57
Copyright
Copyright © Cambridge University Press 1998

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References

Pappas, P.W. (1984) Kinetic analyses of the membranebound alkaline phosphatase activity of Hymenolepis diminuta (Cestoda: Cyclophyllidea) in relation to development of the tapeworm in the definitive host. Journal of Cellular Biochemistry 25, 131–137.CrossRefGoogle Scholar
Pappas, P.W.Leiby, D.L. (1986) Variations in the sizes of eggs and oncospheres and the numbers and distributions of testes in the tapeworm, Hymenolepis diminuta. Journal of Parasitology 72, 383–391.CrossRefGoogle ScholarPubMed
Pappas, P.W., Narcisi, E.M.Rentko, V. (1983) Alterations in border membrane proteins and membrane-bound enzymes of the tapeworm, Hymenolepis diminuta, during development in the definitive host. Molecular and Biochemical Parasitology 8, 317–323.CrossRefGoogle ScholarPubMed
Roberts, LS. (1961) The influence of population density on patterns and physiology of growth in Hymenolepis diminuta (Cestoda: Cyclophyllidea) in the definitive host. Experimental Parasitology 11, 332–371.CrossRefGoogle ScholarPubMed
Uglem, G.L.Pappas, P.W. (1991) Mechanism of 3-O- methylglucose uptake by Hymenolepis diminuta. International Journal for Parasitology 21, 517–520.CrossRefGoogle ScholarPubMed
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