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Description of a simulation model for the population dynamics of Eimeria acervulina infection in broilers

Published online by Cambridge University Press:  06 April 2009

A. M. Henken ,
H. W. Ploeger ,
E. A. M. Graat  and
T. E. Carpenter
A. M. Henken
Affiliation:
Department of Animal Husbandry, Agricultural University, P.O. Box 338, 6700 AH Wageningen, The Netherlands
H. W. Ploeger
Affiliation:
Department of Animal Husbandry, Agricultural University, P.O. Box 338, 6700 AH Wageningen, The Netherlands
E. A. M. Graat
Affiliation:
Department of Animal Husbandry, Agricultural University, P.O. Box 338, 6700 AH Wageningen, The Netherlands
T. E. Carpenter
Affiliation:
Department of Epidemiology and Preventive Medicine, School of Veterinary Medicine, University of California, Davis 95616, USA
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Summary

A simulation model for the population dynamics of Eimeria acervulina infection in broilers is presented. The model describes the development of the numbers of parasites in the various life-stages during the growing period of broilers and the empty house period between grow-outs. The model includes assumptions with respect to development of immunity to E. acervulina infection and effects of application of anticoccidial drugs. The model consists of a set of difference equations that are solved numerically at 1 h intervals. Under constant conditions, an equilibrium level was reached after a few grow-outs during which infection always peaked around the 21st day in the growing period. Within a growing period, infection peaked earlier (later) than the 21st day in case initial numbers of sporulated oocysts were higher (lower) than the equilibrium number.

Keywords

simulationEimeria acervulinacoccidiosisanticoccidial drug efficacyhost immunitybroilers
Type
Research Article
Information
Parasitology , Volume 108 , Issue 5 , June 1994 , pp. 503 - 512
Copyright
Copyright © Cambridge University Press 1994

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