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On the biology of the infective Larva of Monodontus trigonocephalus (Rud.) of Sheep

Published online by Cambridge University Press:  05 June 2009

T. W. M. Cameron
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Extract

The biology of the infective larva of the Sheep Hook-worm Monodontus trigonocephalus would be expected on general grounds to resemble that of Ancylostoma duodenale, to which it is closely related. Two facts in the biology of the adults must, however, be borne in mind. In the first place, the normal temperature of man is about 37° C, while the normal temperature of the sheep is 39°–40° C. Secondly, both Looss (for A. duodenale) and Hesse (for M. trigonocephalus) have shown that the pre-infective larvæ feed actively on faecal matter. Looss has drawn attention to the fact that cultures of Ancylostomes made from the fæces of a host living on an exclusively herbivorous diet, were very much poorer in the resultant crop of larvae than those made from fæces of a host living on a partly carnivorous diet. Now the adult Monodontus lives in a host which is purely herbivorous, and the larvæ are reared in fæces entirely of a vegetable nature. One might therefore expect differences in the biology of the ensheathed stage.

Type
Research Article
Information
Journal of Helminthology , Volume 1 , Issue 5 , December 1923 , pp. 205 - 214
Copyright
Copyright © Cambridge University Press 1923

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