Effect of dietary raw soybeans on coccidiosis in chickens.
Six battery experiments determined the effect of feeding raw soybeans (RSB) in corn-soybean diets on coccidiosis in broiler chickens. The experimental design represents a 2 x 3 factorial arrangement of treatments with three dietary levels of incorporation of RSB (0, 50, and 100%), and chickens either infected or uninfected. The coccidial species tested singularly were Eimeria acervulina, Eimeria maxima, Eimeria necatrix, Eimeria brunetti, and Eimeria tenella. With all species of Eimeria a significant diet by infection interaction was demonstrated with a stepwise increase in weight gain and reduction in lesion scores with increasing levels of raw soybeans. To cause the pancreas to become hypertrophied and hyperfunctional, the 100% RSB diet was fed for an extended period. The experimental design represents a 2 x 3 factorial arrangement of treatments with three feeding regimens [Treatment A: 0% RSB (0 d to termination), Treatment B: (0% RSB: 0 to 12 d then 100% RSB 12 d to termination), and Treatment C: (100% 0 d to termination)] and chickens either infected (E. tenella) or uninfected. There was a significant difference for weight gain between uninfected and infected chicks of Treatments A and C but this difference was absent for Treatment B. Coccidiosis was not reduced by continuously feeding 100% RSB (Treatment C).
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Georgia Poultry Research, Inc., Athens 30607, USA.
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D000821:Animal Feed; D000818:Animals; D001835:Body Weight; D002645:Chickens / Q000378:metabolism / Q000469:parasitology*; D003048:Coccidiosis / Q000178:diet therapy / Q000503:physiopathology / Q000662:veterinary*; D004539:Eimeria / Q000502:physiology; D010179:Pancreas / Q000201:enzymology / Q000503:physiopathology; D011201:Poultry Diseases / Q000178:diet therapy / Q000469:parasitology* / Q000503:physiopathology; D013025:Glycine max