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Studies on the morphology and biology of Entamoeba moshkovskii Tshalaia, 1941

Published online by Cambridge University Press:  06 April 2009

R. A. Neal
Affiliation:
Wellcome Laboratories of Tropical Medicine, London

Extract

1. Entamoeba moshkovskii was isolated from a sewage plant in North London.

2. The morphology and metacystic development is similar to that of E. histolytica and other histolytica-like amoebae, but with differences in minor details.

3. The cysts of E. moshkovskii remain viable when kept at 4° C. for periods up to 10 months providing they are not allowed to dry.

4. If the amoebae are placed in hypotonic solution, the amoebae attempt to eliminate excess water by means of contracting vacuoles, but they eventually die.

5. Experiments have shown that E. moshkovskii is an anaerobe.

6. The optimum temperature for growth is about 24° C. as encystation does not occur at 37° C.

7. E. moshkovskii is not infective to rats or to larvae of the common frog (Rana temporaria) and Salamandra maculosa.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1953

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References

REFERENCES

Amaral, A. D.F. & Azzi Leal, R. (1949). Sôbre uma Endamoeba semelhante à Endamoeba histolytica encontrada em material de esgôto. Rev. paulist. Med. 34, 173.Google Scholar
Azzi Leal, R. & Amaral, A. D.F. (1950). Novos estudos sôbre amebas encontradas em esgôto, com referênda especial a uma endamoeba (E. moshkovskii) semelhante à Endamoeba histolytica. Arg. Fac. Hig. Saúde. públ. Univ. S. Paulo, 4, 125.CrossRefGoogle Scholar
Bishop, A. (1932). Entamoeba aulostomi Nöller. Cultivation, morphology, and method of division; and cultivation of Hexamita sp. Parasitology, 24, 225.CrossRefGoogle Scholar
Bishop, A. (1937). Further observations upon Entamoeba aulostomi Nöller. Parasitology, 29, 57.CrossRefGoogle Scholar
Dobell, C. (1918). Are Entamoeba histolytica and Entamoeba ranarum the same species? An experimental inquiry. Parasitology, 10, 294.CrossRefGoogle Scholar
Dobell, C. (1928). Researches on the intestinal protozoa of monkeys and man. II. Description of the whole life-history of Entamoeba histolytica in cultures. Parasitology, 20, 357.CrossRefGoogle Scholar
Dobell, C. (1942). Some new methods for studying intestinal amoebae and other protozoa. Parasitology, 34, 101.CrossRefGoogle Scholar
Dobell, C. (1952). XII. Bacterial factors influencing the life history of Entamoeba histolytica in cultures. Parasitology, 42, 16.CrossRefGoogle ScholarPubMed
Dobell, C. & Laidlaw, P. P. (1926). On the cultivation of Entamoeba histolytica and some other entozoic amoebae. Parasitology, 18, 283.CrossRefGoogle Scholar
Epstein, G. W. [ = Epstein, H.] (1941). [Parasitic Amoebae.] Ed. by Pavlovsky, E. N.. Moscow, Leningrad. (In Russian.)Google Scholar
Gnezdilov, V. G. (1947). [Materials on the geographical distribution, epidemiology and prophylaxis of amoebiasis.] Med. Parasit., Moscow, 16 (5), 13. (In Russian.)Google Scholar
Gordon, E. (1941). [Purification of sewage from cysts of intestinal protozoa.] Med. Parasit., Moscow, 10 (2), 236. (In Russian.)Google Scholar
Gordon, E.. [Purification of sewage from cysts of intestinal protozoa.] Review in Trop. Dis. Bull. 1943, 40, 311.Google Scholar
Hoare, C. A. (1949). Handbook of Medical Protozoology, p. 301. London: Baillière, Tindall & Cox.Google Scholar
Jones, W. R. (1946). The experimental infection of rats with Entamoeba histolytica: with a method for evaluating the anti-amoebic properties of new compounds. Ann. trop. Med. Parasit. 40, 130.CrossRefGoogle ScholarPubMed
Knowles, R. & Das Gupta, B. M. (1930). On two intestinal protozoa of an Indian turtle. Indian J. med. Res. 18, 97.Google Scholar
Kudo, R. R. (1946). Protozoology, 3rd ed., p. 714. Illinois: Charles C. Thomas.Google Scholar
Lackey, J. B. (1925). Studies on the biology of sewage disposal. The fauna of Imhoff tanks. Bull. N.J. agric. Exp. Sta. no. 417, pp. 139.Google Scholar
Lobeck, E. A. (1940). Entamoeba pyrrhogaster n.sp. with notes on other intestinal amoebae from salamanders. J. Parasit. 26, 243.CrossRefGoogle Scholar
Neal, R. A. (1950 a). A species of Entamoeba from sewage. Trans. R. Soc. trop. Med. Hyg., 44, 9.Google Scholar
Neal, R. A. (1950 b). An experimental study of Entamoeba muris; its morphology, affinities and host-parasite relationship. Parasitology, 40, 343.CrossRefGoogle ScholarPubMed
Pantin, C. F. A. (1946). Notes on Microscopical Technique for Zoologists, p. 40. Cambridge University Press.Google Scholar
Rodhain, J. & Hoof, M. T. van (1947). Entamoeba knowlesi n.sp. parasite de deux tortues: Terrapina cinosternoides et Platysternum megacephalum. Ann. Parasit. hum. comp. 22, 129.CrossRefGoogle Scholar
Sanders, E. P. (1931). The life-cycle of Entamoeba ranarum Grassi (1879). Arch. Protistenk. 74, 365.Google Scholar
Sanders, E. P. & Cleveland, L. R. (1930). The morphology and life-cycle of Entamoeba terrapinae spec, nov. from the terrapin, Chrysemys elegans. Arch. Protistenk. 70, 267.Google Scholar
Savage, R. M. (1939). The distribution of the spawn ponds of the common frog (Rana temporaria Linn.) over a portion of the London Clay and associated drift. Proc. Zool. Soc. Lond. 109, 1.CrossRefGoogle Scholar
Singh, B. N. (1950). A culture method for growing small free-living amoebae for the study of their nuclear division. Nature, Lond., 165, 65.CrossRefGoogle Scholar
Taliaferro, W. H. & Fisher, A. B. (1926). The morphology of motile and encysted Endamoeba ranarum in culture. Ann. trop. Med. Parasit. 20, 89.CrossRefGoogle Scholar
Tshalaia, L. E. [ = Chalaya, L. E.] (1941). [On a species of Entamoeba detected in sewage effluents.] Med. Parasit., Moscow, 10 (2), 244. (In Russian.) Review in Trop. Dis. Bull. 1943, 40, 311.Google Scholar
Tshalaia, L. E. [ = Chalaya, L. E.] (1947). [Contribution to the study of Entamoeba moshkovskii.] Med. Parasit., Moscow, 16 (5), 66. (In Russian.) Abstract in Abstr. World Med. 1948, 4, 110.Google Scholar
Wright, W. H., Cram, E. B. & Nolan, M. O. (1942). Preliminary observations on the effect of sewage treatment processes on the ova and cysts of intestinal parasites. Sewage Wks J. 14, 1274.Google Scholar