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Preliminary Observations on the Infectivity of Ascaris lumbricoides to Swine

Published online by Cambridge University Press:  05 June 2009

Phyllis A. Clapham
Phyllis A. Clapham
Affiliation:
(From the Institute of Agricultural Parasitology, London School of Hygiene and Tropical Medicine.)
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Extract

The question of the immunity of the pig to ascariasis has been considered by helminthologists for some years and is still a vexed question. Ransom (1922) was of the opinion that the pig became immune at the age of 4 months but this was refuted by Morgan of the Institute of Agricultural Parasitology who, in 1931 successfully infected pigs at the age of 10 months and by the present writer (1934) at the age of a year. Sandground in 1929 referred to the difficulty of establishing infections under normal conditions though it is well known that almost every pig under field conditions picks up an infection at an early age. Furthermore, it is notoriously difficult to keep pigs “clean” for experimentation though this can be done, as it is done here, by careful attention to detail during rearing.

Type
Research Article
Information
Journal of Helminthology , Volume 14 , Issue 4 , December 1936 , pp. 229 - 232
Copyright
Copyright © Cambridge University Press 1936

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References

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