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Factors contributing to the retardation of development of Obeliscoides cuniculi in rabbits

Published online by Cambridge University Press:  06 April 2009

M. A. Fernando ,
P. H. G. Stockdale  and
G. C. Ashton
M. A. Fernando
Affiliation:
Department of Pathology and Department of Mathematics and Statistics, University of Guelph, Guelph, Ontario, Canada
P. H. G. Stockdale
Affiliation:
Department of Pathology and Department of Mathematics and Statistics, University of Guelph, Guelph, Ontario, Canada
G. C. Ashton
Affiliation:
Department of Pathology and Department of Mathematics and Statistics, University of Guelph, Guelph, Ontario, Canada
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Extract

The relationship between the age of infective O.cunictili larvae and the proportion that remained retarded in a subsequent infection was investigated. The proportion of retarded larvae recovered was found to depend on the length of time and the temperature at which infective larvae were stored prior to infection. At 4 °C the level of retardation was found to increase with increase in the length of storage until a maximum was reached. Further storage tended to decrease the proportion of larvae that remained retarded. These effects were found to be less marked when the larvae were stored at a higher temperature. At 17 °C the maximum level of retardation reached was lower and the process of the increase and the decrease in retardation was of shorter duration. An increase in the number of larvae from 200 to 6000/rabbit did not appreciably change the proportion that remained retarded.

We are most thankful for the advice and criticisms of Dr J. D. Dunsmore. The skilled technical assistance of Mr Ted Eaton is gratefully acknowledged. This work was supported by the Ontario Department of Agriculture and Food.

Type
Research Article
Information
Parasitology , Volume 63 , Issue 1 , August 1971 , pp. 21 - 29
Copyright
Copyright © Cambridge University Press 1971

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References

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