Hostname: page-component-586b7cd67f-2brh9 Total loading time: 0 Render date: 2024-11-27T17:42:02.875Z Has data issue: false hasContentIssue false
  • English
  • Français

Physiological and histochemical observations on the adult liver fluke, Fasciola hepatica L. III. Egg-shell formation

Published online by Cambridge University Press:  06 April 2009

William Stephenson
William Stephenson
Affiliation:
Department of Zoology, The University, Bristol*
Get access Rights & Permissions [Opens in a new window]

Extract

1. The egg shells of Fasciola are derived from globules or granules contained in the, vitelline cells. These globules contain an orthodihydroxyphenol and protein.

2. The anatomy and histology of the Mehlis's gland region have been described, and the site of liberation of the above granules has been isolated.

3. Mechanical forces, due to the churning action of the uterus, are believed to be responsible for freeing most of the granules. This liberation can be correlated with the presence of spermatozoa in the uterus. The spermatozoa can penetrate the vitelline cells, but this does not free the globules.

4. Active spermatozoa, in alkaline solutions, tend to form aggregates, and incorporate into these aggregates any solid material in the vicinity. This is apparently responsible for the arrangement of cells within the egg, and for the formation of a shell round it from fused vitelline cell globules.

5. The polyphenol of the newly formed egg shell is oxidized into a quinone in the anterior uterine coils. Polyphenol oxidases have not been conclusively demonstrated. The relative uterine coils are surrounded by an especial concentration of a generally distributed tissue haemoglobin.

6. The final egg shell is composed of a quinone tanned protein, similar to the sclerotin of the cockroach ootheca.

7. Suggestions are advanced as to the possible functions of Mehlis's gland and Laurer's canal.

Type
Research Article
Information
Parasitology , Volume 38 , Issue 3 , July 1947 , pp. 128 - 139
Copyright
Copyright © Cambridge University Press 1947

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Baker, J. R. (1944). Quart. J. Micr. Soc. 85, 1.Google Scholar
Butmberg, C. (1871). Inaug. Diss. Dorpat.Google Scholar
Brumpt, E. (1936). Précis de Parasitologic, 5th ed. 1. Paris.Google Scholar
Davenport, H. E. (1945). Nature, Lond., 155, 516.Google Scholar
Dawes, B. (1940). Parasitology, 32, 287.Google Scholar
Fuhrmann, O. (1928). Trematoda in Kükenthal's Hand- buch. Berlin and Leipzig.Google Scholar
Goldschmidt, R. (1905). Zool. Jb. (Anat.), 21, 604.Google Scholar
Goldschmidt, R. (1909). Zool. Anz. 34, 481.Google Scholar
Henneguy, L. F. (1902). C.R. Acad. Sci., Paris, 134, 1235.Google Scholar
Henneguy, L. F. (1906–1907). Arch. Anat. micr. 9, 47.Google Scholar
Keilin, D. & Mann, T. (1938). Proc. Roy. Soc. B, 125, 187.Google Scholar
Keilin, D. & Mann, T. (1939). Nature, Lond., 143, 23.Google Scholar
Kouri, P. & Nauss, R. W. (1938). J. Parasit. 24, 291.Google Scholar
Leuckart, R. (1886–1901). Die menschlichen Parasiten, 2nd ed. Leipzig.Google Scholar
Lison, L. (1936). Histochemie animate. Paris.Google Scholar
Looss, A. (1885). Z. wise. Zool. 41, 390.Google Scholar
Macé, E. (1882). Recherches anatomiques sur la grande douve du foie. Thé;se de medécine. Paris.Google Scholar
Murakami, S. (1937). J. Okayama Med. Soc. 49, 703 (German summary).Google Scholar
Oppenheimer, C. & Stern, K. G. (1939). Biological Oxidation. The Hague.Google Scholar
Ortmann, W. (1908). Zool. Jb. (Anat.), 26, 255.Google Scholar
Ortner-Schönbach, P. (1913). Arch. Zellforsch. 11, 413.Google Scholar
Pryor, M. G. M. (1940). Proc. Roy. Soc. B, 128, 373.Google Scholar
Rees, G. (1940). Parasitology, 32, 372.Google Scholar
Schellenberg, A. (1911). Arch. Zellforsch. 6, 441.Google Scholar
Schubmann, W. (1905). Zool. Jb. (Anat.), 21, 571.Google Scholar
Sommer, F. (1880). Z. wiss. Zool. 34, 539.Google Scholar
Stephenson, W. (1947). Parasitology, 38, 116.Google Scholar
Stiles, C. W. (1894). J. Comp. Med. 15, 225.Google Scholar
Stunkard, H. W. (1943). Biol. Bull. Woods Hole, 85, 227.CrossRefGoogle Scholar
Tayior, E. L. (1934). Trans. Roy. Soc. Trop. Med. Hyg. 27, 499.Google Scholar
Thomas, A. P. (1883). Quart. J. Micr. Soc. 23, 99.Google Scholar
Tyzzer, E. E. (1918). J. Med. Res. 38, 267.Google Scholar
Ujiie, N. (1936 a). J. Med. Ass. Formosa, 36, 1010 (English abstract).Google Scholar
Ujiie, N. (1936 b). J. Med. Ass. Formosa, 36, 1894 (English abstract).Google Scholar
Vialli, M. (1933). Boll. Zool. (Naples), 4, 135.Google Scholar
Vialli, M. (1934). Boll. Zool. (Torino), 5, 21.Google Scholar
Yumoto, Y. (1936). J. Med. Ass. Formosa, 35, 1845 (English abstract).Google Scholar