The effect of antimicrobial feed additives and anticoccidics supplementation on nutrient digestibility, performance and health of broiler rabbits

Veterinarni Medicina 42, 1997, 225-231

The objective of the paper was to determine the effect of antimicrobial feed additives and anticoccidics on nutrient digestibility, performance and health of broiler rabbits. The effect of nitrovin and virginiamycin at a dose of 30 mg/kg of feed and/or granular feed mixture was determined in a metabolic trial. The trial was conducted on 24 rabbits of the hybrid Hyla 2000 between the 33rd and 91st day of their age. A supplement of 30 mg of the active ingredient of nitrovin and virginiamycin had positive effects on the basic characteristics of broiler production. Both additives insignificantly increased fiber digestibility. No coccidiostatic effect of the used additives was observed. The coccidiostatics robenidin, diclazuril and salinomycin were compared in another trial. Control group comprised eight rabbits, experimental groups had six rabbits each. The group of rabbits receiving salinomycin showed insignificantly higher weight gains and better feed conversion in comparison with the other groups, Tab. V. The coccidiostatics did not have any significant effects on nutrient digestibility, except ash. However, a trend of lower values of digestibility was observed in diclazuril (Tab. VI). Salinomycin application reduced fiber digestibility. This finding is in agreement with a theoretical statement that ionophores inhibit gram-positive cellulolytic bacteria. Tab. VII shows data on the number of infected rabbits in control and experimental groups. All control rabbits were infected with coccidia in the second experimental week. All the tested coccidiostatics suppressed the infection in an expressive way. The comparative trial of the three coccidiostatics showed that salinomycin was better than diclazuril and robenidin. Salinomycin in fact eliminated not only eimeria but also cryptosporidia

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