Description of a simulation model for the population dynamics of Eimeria acervulina infection in broilers.
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.
Henken
A M
AM
Department of Animal Husbandry, Agricultural University, Wageningen, The Netherlands.
Ploeger
H W
HW
Graat
E A
EA
Carpenter
T E
TE
D000821:Animal Feed; D000822:Animal Husbandry; D000818:Animals; D002645:Chickens; D003048:Coccidiosis / Q000469:parasitology / Q000517:prevention & control / Q000662:veterinary*; D003049:Coccidiostats / Q000008:administration & dosage; D004539:Eimeria / Q000254:growth & development / Q000276:immunology / Q000302:isolation & purification; D005260:Female; D008297:Male; D008954:Models, Biological; D009426:Netherlands; D011201:Poultry Diseases / Q000276:immunology / Q000469:parasitology* / Q000517:prevention & control; D013170:Spores / Q000302:isolation & purification
D003049:Coccidiostats