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Description of a model to simulate effects of Eimeria acervulina infection on broiler production

Published online by Cambridge University Press:  06 April 2009

A. M. Henken ,
E. A. M. Graat ,
H. W. Ploeger  and
T. E. Carpenter
A. M. Henken
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
H. W. Ploeger
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 effects of Eimeria acervulina infection on technical and economic characteristics in broiler production is presented. The model describes development over time of the growth depression, feed intake reduction, and decrease in feed efficiency associated with infection. The model also shows a phase of compensatory growth during which earlier negative effects are counterbalanced, at least partly. Major assumptions made were: infection with E. acervulina occurs in each flock; production is affected in each flock; compensatory growth takes place because immunity develops and cell regeneration occurs. The results show that the pattern of development of the production characteristics during a flock cycle depends on the initial contamination level. Both a high and low initial contamination level results in a lower average daily gain, a worse feed to gain ratio, and a reduced net revenue compared to an intermediate contamination level.

Keywords

simulationEimeria acervulinacoccidiosisproduction characteristicsnet revenuebroilers
Type
Research Article
Information
Parasitology , Volume 108 , Issue 5 , June 1994 , pp. 513 - 518
Copyright
Copyright © Cambridge University Press 1994

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