Research Note: Impact of Eimeria on apparent retention of components and metabolizable energy in broiler chickens fed single or mixture of feed ingredients-based diets()

The effect of Eimeria on apparent retention (AR) of components and metabolizable energy corrected for nitrogen (AMEn) content in corn, wheat, soybean meal (SBM), and pork meal (PM) was investigated in broiler chickens. A total of 840 male d-old Ross 708 chicks were placed in 84 cages (10 birds/cage) and allocated either a nitrogen-free diet (NFD), or 1 of 6 test cornstarch-based semipurified diets: 1) corn, 2) wheat, 3) SBM, 4) PM, 5) corn, SBM, and PM (CSP) mixture, and 6) wheat, SBM, and PM (WSP) mixture (n = 12). Diets contained 0.3% titanium dioxide and nutrient digestibility was determined by difference method using NFD. On d 10, birds in half of replicates per diet were orally challenge with 1 mL of E. acervulina and E. maxima culture and the other half equal volume of saline. Excreta samples were collected from d 12 to 14. With exception of AR of Ca and P, there was no interaction (P > 0.05) between Eimeria and diet on AR of dry matter, crude fat (CF), crude protein and gross energy and AMEn of ingredients. Eimeria reduced AR of CF (P = 0.01) and had a tendency to reduce AR of DM (P = 0.09) and AMEn (P = 0.063) of ingredients. The data demonstrated exposure to Eimeria impacted nutrient retention and energy utilization irrespective to diet composition.