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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.
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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

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References

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