Efficiency evaluation of anticoccidials against the background of chickens infection with field coccidia isolate

The article gives a comparative efficiency evaluation of anticoccidials of different pharmacological groups at experimental infection of chickens with field coccidia isolate selected from the production sites of the poultry complex of the Belgorod region. The selected mixture of field strains of coccidia is partially resistant to eimicide, maksiban, esdot, decox (anticoccidial index is from 150.0 to 156.3). High sensitivity was noted to robenz, avatek and tsigro (anticoccidial index is from 160.4 to 177.1), in the absence of birds’ death in all groups that receive preparations. The use of preparations against the background of chickens’ infection reduced the loss of body weight gain. In groups receiving eimicide, maksiban and esdot it reduced by 2.3 and 4%, respectively; in groups receiving decox, robenz, avatec and zigro it reduced by 5.7.11 and 15%. It should be taken into account that the partial resistance of coccidia to the preparations mentioned above can be increased and transmitted genetically. Therefore, there is a need for constant monitoring and rotation of preparations at this poultry complex.