Files
Abstract
The influence of salinomycin fed at different ages on live performance, carcass composition and protection against challenge in coccidiosis vaccinated broilers was evaluated in three consecutive trials. A significant improvement in feed conversion was only observed during the first trial in broilers fed salinomycin starting at 13 days of age when compared with broilers fed regular diets. No significant differences in carcass composition were observed. Adequate protection against challenge with the Eimeria species acervulina, mivati, maxima and tenella was also observed. In the second study, the effect of coccidiosis vaccination on live performance, carcass composition and severity of breast myopathies was compared with other coccidiosis control programs. At processing, a significant increase in feed conversion was observed in vaccinated and nicarbazin/salinomycin fed broilers. Significantly higher mortality was observed in broilers fed nicarbazin. No significant differences on carcass composition or severity of woody breast and white striping were observed among treatments.