This experiment was conducted to investigate the effects of Clostridium butyricum(C.butyricum) on pathogen and beneficial bacteria in vitro.C.butyricum was mixed with Escherichia coli(E.coli),Salmonella,C.perfringens,Lactobacillus and Bifidobacterium by different proportions.The mixture were incubated for 36 ~ 48 h,respectively.Those bacteria were incubated individually as control.The results showed that the counts of Escherichia Coli,Salmonella and C.perfringens co-culture groups were significantly lower t...