RESUMO
Objective To observe the antibacterial activity of artificial antimicrobial peptides (AMPs) to Blastomyces albicans, E. coli and Staphylococcus aureus in oral infection in vitro. Methods The AMPs were dissolved into PBS or sterilized saliva, then the inhibi-tion of different concentration AMPs to E. coil was evaluated by tube testing. The inhibition effect of different concentration of AMPs to Staph-ylococcus aureus and Blastomyces albicans were evaluated by antibiotic-susceptive test paper. Results When the concentration of AMPs added to broth of E. coli is from 150μmol/L to 300μmol/L , the bacterium count is 0 while the number in control is 6700 ～ 9200cfu/ml. At 100μg/tablet AMPs, the diameter of inhibitor zones of Staphylococcus aureus and Blastomyces albicans are 13mm and 11 mm. At 300μg/ tablet, the diameter are 16 mm and 17mm. AMPs dissolved in PBS and saliva have similar antimicrobial activity. Gonclusions The AMPs is effective to prevent Blastomyces albicans, E. coli and Staphylococcus aurcus in oral infection in vitro.