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Systems analysis of a host-parasite interaction*

Published online by Cambridge University Press:  06 April 2009

L. H. Ractliffe ,
H. M. Taylor ,
J. H. Whitlock  and
W. R. Lynn
L. H. Ractliffe
Affiliation:
Center for Environmental Quality Management, Hollister Hall, Cornell University, Ithaca, New York
H. M. Taylor
Affiliation:
Center for Environmental Quality Management, Hollister Hall, Cornell University, Ithaca, New York
J. H. Whitlock
Affiliation:
Center for Environmental Quality Management, Hollister Hall, Cornell University, Ithaca, New York
W. R. Lynn
Affiliation:
Center for Environmental Quality Management, Hollister Hall, Cornell University, Ithaca, New York
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Extract

Most epidemiological models assume that disease is the inevitable outcome of infection (see Bailey, 1957). Yet as Dubos (1965) has said; ‘Throughout nature, infection without disease is the rule rather than the exception’. There are, in fact, many diseases whose distribution cannot be explained solely by a consideration of the probabilities of host parasite encounters. In these cases, a diseased state is only one possible outcome of an interaction between parasite phenotypes, host phenotypes and the external environment. Haemonchosis is an example of such a disease and has been studied extensively in quantitative terms (see Whitlock & Georgi, 1968).

Type
Research Article
Information
Parasitology , Volume 59 , Issue 3 , August 1969 , pp. 649 - 661
Copyright
Copyright © Cambridge University Press 1969

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References

REFERENCES

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