ABSTRACT
In order to study the effect of concomitant use of a probiotic with Lactobacillus origin [Primalac] and a coccidiosis vaccine [Paracox-5] in experimental coccidial infection of broilers, 600 day old male broiler chickens were randomly divided into five groups of 120 with four replicates. Groups three, four and five received probiotic, coccidiosis vaccine and probiotic + coccidiosis vaccine, respectively. At 26 days of age all groups[except first group] were challenged orally with a suspension of sporulated oocystes of E. acervulina, E. maxima and E. tenella. Serum carotenoid levels were determined before challenge and 6 days after that OPG of the feces was measured at 6 to 10 days post challenge. Performance parameters were also determined during the experiment. OPG of the treated groups with vaccine and /or probiotic were significantly lower than the positive control [p< 0.05]. It was concluded that and coccidiosis vaccine probiotic with Lactobacillus origin [to some extent] are able to control negative impacts of coccidial infection. In the meantime simultaneous usage of probiotic and coccidiosis vaccine, did not have any interaction with efficacy of the vaccine