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Observations on Entamoeba histolytica

Published online by Cambridge University Press:  06 April 2009

D. Ward Cutler
D. Ward Cutler
Affiliation:
Assistant Lecturer in Zoology, Victoria University, Manchester.
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Extract

1. Observations on E. histolytica from the human intestine have been made and compared with amoebae living in culture media and in the ulcers of the large intestines of cats, which have died of amoebic dysentery.

2. The effects of the substances chlorine, tyrosin, and skatol on culture amoebae have been investigated; it has been found that the two first substances stimulate vegetative reproduction, but that skatol induces cyst formation.

3. The changes that the nucleus undergoes preparatory to division and the behaviour of the karyosome during division are fully described. It is shown that the nuclei originally described as characteristic of E. histolytica and E. tetragena are phases of nuclear change in the life history of the same animal.

4. Cyst formation and the nuclear divisions in the cysts are described, together with a short discussion as to the view taken that the chromatoid bodies are not comparable with the chromidia of other Rhizopoda.

5. Reasons are adduced for the suggestion that during the further development of the cysts quadrinucleate amoebae emerge, which divide to form four small amoebulae.

6. Degeneration in E. histolylica is described and the view of Darling, that budding phenomena are degenerative ones, is confirmed.

Type
Research Article
Information
Parasitology , Volume 11 , Issue 2 , February 1919 , pp. 127 - 146
Copyright
Copyright © Cambridge University Press 1919

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References

Bartlett, G. B. (1917). Quart. Journ. Medicine, X.Google Scholar
Collin, B. (1913). See ref. Arch. f. Protistenk. XXXIV. 185.Google Scholar
Cropper, J. W. and Drew, A. H. (1914).Researches into Induced Cell-Reproduction in Amoebae. London.Google Scholar
Craig, C. F. (1908, 1913). Journ. Infect. Diseases, V., XIII.Google Scholar
Cutler, D. W. (1917, 1918). Journ. Path, and Bact. XXI., XXII.Google Scholar
Dale, H. H. and Dobell, C. (1917). Journ. Pharm. and Exp. Therap. X.Google Scholar
Darling, S. T. See ref. Arch. f. Protistenk. XXXIV. 185.Google Scholar
Dobell, C. (1909). See ref. Parasitol. X. 310.Google Scholar
Dobell, C. (1914). Arch. f. Protistenk. XXXIV.Google Scholar
Dobell, C. (1918). Parasitol. X.Google Scholar
Dobell, C. and Jepps, M. (1917). Parasitol. 310.Google Scholar
Dobell, C. and Jepps, M. (1918). Parasitol. 320.CrossRefGoogle Scholar
Doflein, F. (1911). Lehrbuch der Protozoenkunde. Jena.Google Scholar
Elmassian, M. (1909). See ref. Arch. f. Protistenk. XXXIV. 186.Google Scholar
Fantham, B. (1911). Ann. Trop. Med. and Parasitol. (Liverpool), IV.Google Scholar
Greenwood, M. (1894). Phil. Trans. (B), CLXXXV. 335.Google Scholar
Hartmann, M. See ref. Arch. f. Protistenk. XXXIV. 186.Google Scholar
Hertwig, R. (1898). Abhandl. bayer Akad. XIX.Google Scholar
James, W. M. (1915). Ann. Trop. Med. and Parasitol. VIII.Google Scholar
Job, E. and Hirtzmann, L. (1916). C. R. Soc. Biol. LXXIV.Google Scholar
Kuenen, and Swellengrebel, (1913). Centralbl. Bald. (Orig.), LXXI.Google Scholar
Mathis, C. and Mercier, L. (1916 and 1917). Parasitol. X. 350.Google Scholar
Mercier, L. (1910). Arch.f. Protistenk. XX. 143.Google Scholar
Minchin, E. A. (1912). An Introduction to the Study of Protozoa. London.Google Scholar
Nirenstein, E. (1905). Zeitschr.f. allgem. Physiol. V.Google Scholar
Prantl, H. (1907). Arch. f. Protistenk. VIII. 281.Google Scholar
Rhumbler, (1910). Arch. Entwicklungsmech. XXX. 194.CrossRefGoogle Scholar
Schaudinn, F. (1903). See ref. Parasitol. X. 311.Google Scholar
Smith, M. and Mathews, J. R. (1917). Ann. Troy. Med. and Parasitol. X.Google Scholar
Woodcock, H. M., Penfold, W. and Drew, A. H. (20. V. 1916). Brit. Med. Journ.Google Scholar
Werner, (1908). Arch. f. Schiffs. u. Tropenhyg. XII.Google Scholar
Wenyon, C. M. (1915). See ref. Parasitol. X. 311.Google Scholar