Experimental study on the evaluation of long-acting disinfection effect of polyhexamethylene biguanide hydrochloride disinfectant
Objective To evaluate the long-acting disinfection effect of polyhexamethylene biguanide hydrochloride disinfectant,and to provide a reference basis for the establishment of evaluation method for the long-acting disinfection effect of disinfectants in China.Methods Referring to the evaluation method of British standard PAS 2424,the killing effect of disinfectant samples with different concentrations on bacterial propagules and pathogenic yeasts was observed.Results This disinfectant sample had the best long-acting disinfection effect on Escherichia coli,followed by the long-acting disinfection effect on Staphylococcus aureus and Pseudomonas aeruginosa,and the worst long-acting disinfection effect on Candida albicans,and the difference was statistically significant(P<0.05).Conclusion The polyhexamethylene biguanide hydrochloride disinfectant sample has a 24 h long-acting disinfection effect on Escherichia coli and Staphylococcus aureus.