Abstract: This paper studied on antimicrobial characteristics of DIF.In another word,the MIC,MBC and pH range were tested.The extracted constituents showed stability against high temperature and pressure.Animal experiment fed on typical foods were experienced.The results showed: the MIC and MBC of the extract of DIF affecting 8 species of bacteria were low.That was:Bacillus cereus:MIC5.0% ,MBC5.0% ,Bacillus subtilis:MIC5.0% ,MBC10.0% ;Staphy lococcus aureus:MIC2.5% ,MBC2.5% ;Staphylococcus cremoris:MIC1.25% ,MBC1.25% ;Escherichia coli:MIC5.0% ,MBC5.0% ;Salmonella typhi:MIC10.0% ,MBC10.0% ;Shigcila dysenteriac:MIC2.5% ,MBC5.0% and Bacillus thuringiensis:MIC2.5% ,MBC2.5% .The obvious antimicrobial effects on pH value ranges of DIF’s extract were from 5.0 to 8.5.Meanwhile,the antimicrobial activity under high temperature and strong pressure was stable with obvious antimicrobial effect on animal tests.

Key words:  , Dictyophora indusia fisscher Antimicrobial Characteristics；