A study was conducted to evaluate the effects of healthy broiler breeder undefined cecal culture and commercial probiotic (PrimaLac®) on broiler performance and serum lipids of broiler chickens from 1 to 42 days of age. 288 day-old Ross male broiler chickens were used in a 3×2 factorial arrangement with three levels of cecal cultures (0.00, 2.50, 5.00 ml/l into drinking water) and 2 levels of PrimaLac (0.00, 0.09 % into the diet). The cecal cultures and PrimaLac were used up to 7 days of age. Body weight gain was significantly increased in cecal cultures-inoculated than that of control broilers at the critical period of 0-21 days of age. A higher body weight gain was also observed in PrimaLac-treated as compared to control broilers for the whole growing period of 0-42 days. Feed intake and feed conversion ratio decreased in PrimaLac-fed as compared to control broilers from 0-21 days of age. Cecal cultures and PrimaLac did not decrease serum lipid components. More research is needed to clarify the beneficial or adverse effect of cecal cultures as probiotics in poultry.

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