Hostname: page-component-cd9895bd7-jn8rn Total loading time: 0 Render date: 2024-12-27T09:52:48.686Z Has data issue: false hasContentIssue false
  • English
  • Français

Some Experiments on the Extra-Corporeal Hatching of the Eggs of Ascaris suum

Published online by Cambridge University Press:  18 November 2009

D. W. Fenwick
D. W. Fenwick
Affiliation:
Research Fellow, University of Wales.
Get access Rights & Permissions [Opens in a new window]

Extract

Numerous attempts have been made in the past to induce the eggs of Ascaris suum to hatch outside the body of the host. Extra-corporeal hatching has been observed under a variety of conditions by different workers. Kondo (1920, 1922), Asada (1921) and others record hatching in water, charcoal and sand cultures. Wharton (1915) states that hatching will occur in alkaline digestive juices, while Martin (1913) records a similar phenomenon in pancreatic fluid. Many different explanations have been offered to explain this hatching. Wharton suggested that the interaction of algae and sand might have some effect. Ohba (1923), who found that hatching would occur in 0·2% hydrochloric acid and 0·2% sodium carbonate believed that extra-corporeal hatching was limited to very old cultures of eggs. Many workers are of the opinion that some stimulus normally present in the digestive tract is necessary for hatching.

Type
Research Papers
Information
Journal of Helminthology , Volume 17 , Issue 2 , April 1939 , pp. 69 - 82
Copyright
Copyright © Cambridge University Press 1939

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

Asada, J., 1921.—“On the Cutaneous infection by Ascaris, together with a Notice on the New Method of Cultivation of the Eggs of Ascaris.” Tokyo med. News (W.L. 21317c), No. 2238, Abstracted in Japan. med. World, I (8), p. 14. (W.L. 10880.)Google Scholar
Brown, H. W., 1928.—“A Quantitative Study of the Influence of Oxygen and Temperature on the Embryonic Development of the Eggs of the Pig Ascarid (Ascaris suum Goeze).” J. Parasit., XIV (3), 141–160. (W.L. 11428.)CrossRefGoogle Scholar
Kondo, K., 1920.—“Percutaneous Infection with Ascaris lumbricoides.” J. med. Ass. Formosa, No. 211, 630–633. (In Japanese, summary in English.) (W.L. 11337.)Google Scholar
Kondo, K., 1922.—“Contribution to the Experimental Knowledge of Ascaris.” Tokyo med. News (W.L. 21317c), No. 2263, Abstracted in Japan med. World, II (4), p. 112. (W.L. 10880.)Google Scholar
Lapage, G., 1935.—“The Behaviour of Sterilised Exsheathed Infective Trichostrongylid Larvae in Sterile Media resembling their Environment in Ovine Hosts.” J. Helminth. XIII (2), 115–128. (W.L. 11224b.)CrossRefGoogle Scholar
Lapage, G., 1935.—“The Second Ecdysis of Infective Nematode Larvae.”—Parasitology, XXVII (2), 186–206. (W.L. 16035.)CrossRefGoogle Scholar
Martin, A., 1913.—“Recherches sur les conditions du développement embryonnaire de Nématodes parasites.” Ann. Sci. nat. (b) Zoology, XVIII, 1–151. (W.L. 915.)Google Scholar
McRae, A., 1935.—“The Extra-Corporeal Hatching of Ascaris Eggs.” J. Parasit., XXI (3), 222–223. (W.L. 11428.)CrossRefGoogle Scholar
Ohba, T., 1923.—“On the Conditions necessary for Hatching and the Infective Power of the Eggs of Ascaris lumbricoides.” J. med. Ass. Formosa (W.L. 11337), No. 228, Abstracted in: Jap. J. Zool, I, p. 121. (W.L. 10881q.)Google Scholar
Ransom, B. H., & Foster, W. D., 1919.—“Recent Discoveries concerning the Life History of Ascaris lumbricoides.” J. Parasit. V (3), 93–99. (W.L. 11428.)CrossRefGoogle Scholar
Stewart, F. H., 1921.—“On the Life History of Ascaris lumbricoides, L. Part V.” Parasitology, XIII (1), 37–47. (W.L. 16035.)CrossRefGoogle Scholar
Wharton, L. D., 1915.—“The Development of the Eggs of Ascaris lumbricoides.” Philipp. J. Sci. (b) Medicine X (1), 19–23. (W.L. 16189.)Google Scholar
Yoshida, S. & Toyoda, K., 1938.—“Artificial Hatching of Ascaris eggs.” Sivro Jubilar do Professor Lauro Travassos, Rio de Janeiro, 1938, p. 569–577.Google Scholar