The experiment was conducted with the objective of examining the distribution of intestinal microflora diversity by ERIC-PCR and PCR-DGGE after chickens were orally treated with Bacillus subtilis.Fifteen 28-day-old broiler chickens were administered with Bacillus subtilis suspension(2×109 CFU/kg body weight,twice a day for 3 consecutive days by oral gavage).The intestinal microflora diversity in 34-day-old broilers was analyzed by ERIC-PCR and PCR-DGGE,and sequence analyses were conducted with DNA recovered...