Investigation the effect of three lactobacilli isolates on performance and carcass characteristics of broilers

The effects of administration of three lactobacilli isolates on performance, carcass characteristics and some blood factors of broiler chickens were investigated. Total of 320 day old male chicks (Ross 308) were randomly distributed to 4 experimental groups of 4 replicates of 20 chicks. Control group did not receive any probiotic culture in drinking water. Groups lactobacillus sp.1, L. rhamnosus and L. sp.2 received one of the three lactobacilli culture in final concentration of 10.6 log cfu/ml of drinking water from 9 to 49 days of age. Administration of L. rhamnosus culture resulted the highest body weight gain on day of 49 in comparison to the other groups (p<0.05). Lactobacilli did not influence the feed intake, weight and length of internal organs and carcass characteristics of chicks and blood factors except of spleen weight, jejunum length and total carcass weight (p>0.05).