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Development of Haemonchus contortus In vitro and the Stimulus from the Host

R. I. Sommerville
The Journal of Parasitology
Vol. 63, No. 2 (Apr., 1977), pp. 344-347
DOI: 10.2307/3280076
Stable URL: http://www.jstor.org/stable/3280076
Page Count: 4
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Development of Haemonchus contortus In vitro and the Stimulus from the Host
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Abstract

Infective larvae of Haemonchus contortus which have been exposed for about 9 hr to relatively high partial pressures of carbon dioxide at near-neutral pH, as they might be in the rumen, develop slowly to the fourth stage or not at all. But following this treatment, exposure to lower partial pressures of carbon dioxide and higher concentrations of hydrogen ions, such as might be encountered in the abomasal mucosa, brings about development at a rate comparable with that in the sheep.

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