EXPERIMENTAL OBSERVATION ON GERMICIDAL EFFICACY OF COMPOUND CHLORHEXIDINE ACETATE DISINFECTANT

In order to know the germicidal efficacy of compound chlorhexidine acetate disinfectant,suspension quantitative germicidal test and field trial were used to carry out experimental observation.Results: The killing logarithm values of Staphylococcus aureus and Escherichia coli exposed to the stock solution of the compound disinfectant containing chlorhexidine acetate 1540 mg/L for 3 min were 5.0.Spraying moistening disinfection of hands and forearms with the disinfectant for 2～3 min could kill the natural bacteria by a logarithm 1.0 in average.Aerosol spraying disinfection of a 45 m~3 room with the stock solution of the disinfectant at a dosage of 8 ml/m~3 for 30 min caused 97.5% eradicating rate of natural bacteria in air.After the stock solution of the disinfectant was stored in sealed contition at 37℃ for 90 days,its chlorhexidine acetate content decreased by 1.94%.Conclusion: The disinfectant is stable and has good efficacy in killing vegetative forms of bacteria and natural bacteria on skin.