Effect of some isolated bacteria from commercial probiotics on growth, carcass composition and immune system of Japanese quail

In order to investigate the effect of some isolated bacteria from commercial probiotics on growth، carcass composition and immune system of Japanese quail، an experiment was conducted using two hundred and ten 1- d old. Birds were randomly assigned into 7 experimental groups consist of 10 chicks، and 3 replicates. The 6 isolated bacteria from commercial probiotics were Pediococcus acidilactici، Enterococcus faecium، Bacillus subtilis، B. licheniformis، Lactococcus lactis، and Pediococcus pentosaceus. Isolated bacteria were cultured on a daily basis and administered via drinking water at 109 cfu/l. The control group did not receive any additive in drinking water. All administered bacteria caused increase in 42 d body weight compared to control، else Pediococcus acidilactici. The heaviest body and carcass weights were belonging to birds fed on Lactococcus lactis (P<0. 01). Lipid and protein contents of carcass were influenced by administered probiotic isolates. The birds drank bacilli isolates had the highest fat and the lowest protein contents in their carcasses. Carcass efficiency، spleen and bursa of Fabricius relative weights were influenced by isolates. However، no differences were observed when compared to control (P>0. 01). The highest anti-SRBC antibody titer was observed in the birds received Bacillus subtilis and Pediococcus acidilactici.