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Investigations on osmotic regulation in the parasitic nematode, Aspiculuris tetraptera Schulz

Published online by Cambridge University Press:  06 April 2009

A. O. Anya
A. O. Anya
Affiliation:
The Molteno Institute of Biology and Parasitology, University of Cambridge
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Extract

In the mouse pinworm, Aspiculuris tetraptera, the basic features of the process of osmotic regulation is similar to the process in other nematodes such as Parascaris equorum, Rhabditis terrestris and Hammerschmidtiella diesingi. The ability to osmoregulate is, however, utilized more effectively in a hypertonic than in a hypotonic solution.

The body fluid is isotonic with 35 % sea water. The relative accuracy of this value is confirmed by direct measurements of the depression of freezing point of the body fluid. This is approximately 0.68–0.69 °C, which is approximately 0.12 % NaCl, which is higher than the value for Ascaris (= 0.655 °C).

My thanks are due to Dr D. L. Lee for helpful discussions on some aspects of this study.

Type
Research Article
Information
Parasitology , Volume 56 , Issue 3 , August 1966 , pp. 583 - 588
Copyright
Copyright © Cambridge University Press 1966

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References

REFERENCES

Anya, A. O. (1966). The structure and chemical composition of the nematode cuticle. Observations on some oxyurids and Ascaris. Parasitology 56, 179–98.CrossRefGoogle ScholarPubMed
Hobson, A. D., Stephenson, W. & Beadle, L. C. (1952). Studies on the physiology of Ascaris lumbricoides. I. The relation of the total osmotic pressure, conductivity and chloride content of the body fluid to that of the external environment. J. exp. Biol. 29, 1–21.CrossRefGoogle Scholar
Lee, D. L. (1960). The effect of changes in the osmotic pressure upon Hammerschmidtiella diesingi (Hammerschmidt 1838) with reference to the survival of the nematode during moulting of the cockroach. Parasitology 50, 241–6.CrossRefGoogle Scholar
Lockwood, A. P. M. (1960). ‘Ringer’ solutions and some notes on the physiological basis of their ionic composition. Comp. Biochem. Physiol. 2, 241–89.CrossRefGoogle Scholar
Lyman, J. & Flemming, R. H. (1940). J. Mar. Res. 3, 134 (quoted by Lockwood, 1960).Google Scholar
Pannikar, N. K. & Sproston, N. G. (1941). Osmotic relations of some metazoan parasites. Parasitology 33, 214–23.CrossRefGoogle Scholar
Prosser, C. L. & Brown, F. A. (1950). Comparative Animal Physiology. London and Philadelphia: W. B. Saunders Company.Google Scholar
Ramsay, J. A. & Brown, R. H. J. (1955). Simplified apparatus and procedure for freezing-point determinations upon small volumes of fluid. J. Scient. Instrum. 32, 372.CrossRefGoogle Scholar
Rogers, W. P. (1962). The Nature of Parasitism. New York: Academic Press.Google Scholar
Schopfer, W. H. (1925). Recherches sur la concentration moléculaire des sues des parasites. Parasitology 17, 221–31.CrossRefGoogle Scholar
Stephenson, W. (1942). The effect of variations in osmotic pressure upon a free-living soil nematode. Parasitology 24, 253–65.CrossRefGoogle Scholar