Hostname: page-component-7479d7b7d-qlrfm Total loading time: 0 Render date: 2024-07-13T18:18:29.606Z Has data issue: false hasContentIssue false
  • English
  • Français

The inhibitory effect of CO2 on the ecdysis of infective Haemonchus contortus cayugensis larvae

Published online by Cambridge University Press:  06 April 2009

J. Owen D. Slocombe  and
J. H. Whitlock
J. Owen D. Slocombe
Affiliation:
Department of Pathology, New York State Veterinary College, Cornell Univeristy, Ithaca, N. Y.
J. H. Whitlock
Affiliation:
Department of Pathology, New York State Veterinary College, Cornell Univeristy, Ithaca, N. Y.
Get access Rights & Permissions [Opens in a new window]

Extract

Infective Haemonchus contortus cayugensis larvae were stimulated to exsheath in 0·02 m-Na2B4O7. 10H2O, into which was bubbled CO2. The larvae under the exsheathing stimulus were found to be coiled and sluggish. The larvae became very active after most of the CO2 was removed by compressed air, oxygen or nitrogen. The exsheathment rate in each of the latter instances was higher than when larvae were exsheathed completely in an atmosphere of CO2. Carbon dioxide is an essential component of the exsheathing stimulus, but the continued presence of a high pCO2 or carbonic reaction products appeared to inhibit larval motility and caused lower exsheathment rates.

Type
Research Article
Information
Parasitology , Volume 61 , Issue 2 , October 1970 , pp. 253 - 258
Copyright
Copyright © Cambridge University Press 1970

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

REFERENCES

Bucknor, A. J. E. (1966). The role of carbon dioxide and adjuvant salts in an exsheathing mechanism of the infective larvae of Hasmonchus contortus cayugensis. Das & Whitlock, 1960. Ph.D. Thesis, Cornell University.Google Scholar
Conway, D. P. (1964). Some effects of temperature on the development and activity of Haemonchus contortus. Cornell Veterinarian 54, 266–70.Google ScholarPubMed
Hansen, E. L., Silverman, P. H. & Buechner, E. J. (1966). The development of Haemonchus contortus on media designed for studies on Caenorhabdities briggsae. Journal of Parasitology 52, 137–40.CrossRefGoogle Scholar
Lapage, G. (1935). The second ecdysis of infective nematode larvae. Parasitology 27, 186–206.CrossRefGoogle Scholar
Rogers, W. P. & Sommerville, R. I. (1960). The physiology of the second ecdysis of parasitic nematodes. Parasitology 50, 329–48.Google ScholarPubMed
Rogers, W. P. & Sommerville, R. I. (1968). The infectious process, and its relation to the development of early parasitic stages of nematodes. Advances in Parasitology 6, 327–48.CrossRefGoogle Scholar
Roughton, F. J. W. & Booth, V. H. (1938). The catalytic effect of buffers on the reaction CO2+H2O → H2CO3. Biochemical Journal 32, 2049–69.CrossRefGoogle Scholar
Silverman, P. H. & Podger, K. R. (1964). In vitro exsheathment of some nematode larvae. Experimental Parasitology 15, 314–24.CrossRefGoogle Scholar
Slocombe, J. O. D. (1969). Analysis of parameters in exsheathment of infective larvae of Haemonchus contortus cayugensis. Das & Whitlock 1960. Ph.D. Thesis, Cornell University.Google Scholar
Slocombe, J. O. D. & Whitlock, J. H. (1969). Rapid ecdysis of infective Haemonchus contortus cayugensis larvae. Journal of Parasitology 55, 1102–3.CrossRefGoogle Scholar
Slocombe, J. O. D. & Whitlock, J. H. (1970). Effects of heat and Lugol's iodine on the evaluation of ecdysis of infective Hasmonchus contortus cayugensis larvae. Transactions of the American Microscopical Society 89, 71–4.CrossRefGoogle ScholarPubMed
Taylor, A. J. & Whitlock, J. H. (1960 a). Further notes on the exsheathing mechanisms of third-stage larvae of Haemonchus contortus. American Journal of Veterinary Research 21, 318.Google Scholar
Taylor, A. J. & Whitlock, J. H. (1960 b). The exsheathing stimulus for infective larvae of Haemonchus contortus. Cornell Veterinarian 50, 339–44.Google ScholarPubMed
Whitlock, J. H. (1966). Biology of a nematode. In Biology of Parasites. Ed. Soulsby, E. J. E.. New York: Academic Press.Google Scholar