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Population dynamics in echinococcosis and cysticercosis: comparison of the response of Echinococcus granulosus, Taenia hydatigena and T. ovis to control

Published online by Cambridge University Press:  06 April 2009

M. A. Gemmell ,
J. R. Lawson ,
M. G. Roberts ,
B. R. Kerin  and
C. J. Mason
M. A. Gemmell
Affiliation:
Hydatid Research Unit, Research Division, Ministry of Agriculture and Fisheries, University of Otago Medical School, P.O. Box 913, Dunedin, New Zealand
J. R. Lawson
Affiliation:
Hydatid Research Unit, Research Division, Ministry of Agriculture and Fisheries, University of Otago Medical School, P.O. Box 913, Dunedin, New Zealand
M. G. Roberts
Affiliation:
Wallaceville Animal Research Centre, Research Division, Ministry of Agriculture and Fisheries, Private Bag, Upper Hutt, New Zealand
B. R. Kerin
Affiliation:
Hydatid Research Unit, Research Division, Ministry of Agriculture and Fisheries, University of Otago Medical School, P.O. Box 913, Dunedin, New Zealand
C. J. Mason
Affiliation:
Wallaceville Animal Research Centre, Research Division, Ministry of Agriculture and Fisheries, Private Bag, Upper Hutt, New Zealand
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Summary

A comparative study has been made of the progress in the control of ovine echinococcosis caused by Echinococcus granulosus and the ovine cysticercoses caused by Taenia hydatigena and T. ovis in New Zealand. The methods of control included an educational and a dog-dosing programme. In the Styx field trial, the Otago/Southland Surveillance Programme and the national control programme, E. granulosus declined towards extinction. In contrast, this same control effort transformed the cysticercoses from hyper-endemic to endemic status with focal epidemics. In this unstable state, the density-dependent constraint was negligible and superinfection occurred.

Type
Research Article
Information
Parasitology , Volume 93 , Issue 2 , October 1986 , pp. 357 - 369
Copyright
Copyright © Cambridge University Press 1986

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