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The Effect of Increased and Decreased Oxygen Pressure upon the Intestinal Protozoa of Macacus rhesus

Published online by Cambridge University Press:  06 April 2009

Ann Bishop
Ann Bishop
Affiliation:
National Institute for Medical Research, London.
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Extract

In his experiments upon the toxicity of oxygen for protozoa Cleveland (1925, a, b, c) was able to kill the intestinal protozoa of Termites, without injuring the host, by increasing the pressure of oxygen for varying lengths of time. He found that at one atmosphere pressure of oxygen the intestinal protozoa of Leucotermes were killed in 24 hours; those of Termopsis in 72 hours; whilst those of Reticulitermes and Cryptotermes were not all killed in ten days. At 3·5 atmospheres of oxygen he found that the intestinal protozoa of all four species were killed in less than an hour. At this pressure the intestinal protozoa of cockroach and frog were killed in 3½ hours and 28 hours respectively, whereas it took 90 hours to kill the cockroaches and 65 hours to kill some of the frogs. He also experimented upon warm-blooded vertebrates (rats), but he found that these animals survived only 5–6 hours at 3·5 atmospheres of oxygen and their intestinal protozoa were not killed in that time. Trichomonas, grown in cultures, however, from frog, rat, and man, were killed in 6, 10, and 11 hours respectively when subjected to 3·5 atmospheres of oxygen.

Type
Research Article
Information
Parasitology , Volume 19 , Issue 4 , December 1927 , pp. 401 - 404
Copyright
Copyright © Cambridge University Press 1927

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References

REFERENCES

Binger, C. A. L., Faulkner, J. M. and Moore, R. L. (1927). Oxygen poisoning in Mammals. J. Exp. Med. 45, 849.CrossRefGoogle ScholarPubMed
Campbell, J. A. (1927). Further Observations on Oxygen Acclimatisation. J. Physiol. 63, 325.CrossRefGoogle ScholarPubMed
Campbell, J. A. (1927 a). Note on some Pathological Changes in the Tissues during attempted Acclimatisation to Alterations of O2-pressure in the Air. Brit. J. Exp. Path. 8.Google Scholar
Cleveland, L. R. (1925). The Effects of Oxygenation and Starvation on the Symbiosis between the Termite, Termopsis, and its intestinal Flagellates. Biol. Bull. 48, 309.CrossRefGoogle Scholar
Cleveland, L. R. (1925 a). Toxicity of Oxygen for Protozoa in vivo and in vitro: animals defaunated without injury. Biol. Bull. 48, 455.CrossRefGoogle Scholar
Cleveland, L. R. (1925 b). Les effets de l'inanition et de l'oxygénation sur la symbiose entre les termites et leurs flagellés intestinaux. Ann. Parasitol. 3, 35.CrossRefGoogle Scholar
Cleveland, L. R. (1925 c). Action toxique de l'oxygène sur les Protozoaires in vivo et in vitro. Son utilisation pour débarrasser les animaux de leurs parasites. Ann. Parasitol. 3, 384.CrossRefGoogle Scholar
Cleveland, L. R. (1926 d). Some problems which may be studied by Oxygenation. Science, 63, 168.CrossRefGoogle ScholarPubMed
Dobell, , Clifford, . (1917). Amoebic Dysentery and the Protozoological Investigation of Cases and Carriers. Medical Research Committee, Special Report Series, No. 4.Google Scholar
Dobell, , Clifford, . (1925). Report of the Medical Research Council for the Year 1924–1925, p. 32.Google Scholar
Dobell, C. and Laidlaw, P. P. (1926). On the Cultivation of Entamoeba histolytica and some other entozoic amoebae. Parasitol. 18, 283.CrossRefGoogle Scholar
Dobell, C. and O'Connor, F. W. (1921). The Intestinal Protozoa of Man. London.CrossRefGoogle Scholar
Lorrain, Smith J. (1899). The Pathological Effects due to Increase of Oxygen Tension in the Air breathed. J. Physiol. 24, 19.Google Scholar
Wenyon, C. M. and O'Connor, F. W. (1917). Human Intestinal Protozoa in the Near East. London.Google Scholar