四种消毒剂对嗜肺军团菌杀灭效果的实验研究

目的研究4种消毒剂对嗜肺军团菌杀灭效果。方法采用悬液定量杀菌试验方法,对含溴消毒剂颗粒、含氯消毒片、过氧乙酸和双链季铵盐等进行了实验室观察。结果在常温下,用含有效溴200 mg/L的消毒剂颗粒溶液、有效氯50 mg/L消毒片溶液和250 mg/L双长链季铵盐消毒液作用10 min,对悬液内嗜肺军团杆菌杀灭对数值均>5.0。用含20 mg/L过氧乙酸消毒液作用2.5 min,对悬液内嗜肺军团杆菌的杀灭对数值>5.0。4种消毒剂均随着有效浓度的增加,作用时间的延长,杀灭效果递增。结论所试验的4种消毒剂均在较低浓度下,能有效杀灭悬液内嗜肺军团菌。

STUDY ON EFFICACY OF FOUR KINDS OF CHEMICAL DISINFECTANT IN KILLING Legionella pneumophila

Objective To study the efficacy of four chemical disinfectants in killing Legionella pneumophila.Methods Suspension quantitative germicidal test was carried out to observe the killing efficacy of bromine-containing disinfectant,chlorine-containing disinfectant,peroxyacetic acid and double-chain quaternary ammonium salt.Results The disinfectant containing 50 mg/L available bromine,that containing 200 mg/L available chlorine and 250 mg/L double-chain quaternary ammonium salt with a 10 min contact time,or peroxyacetic acid containing 20 mg/L with a 2.5 min contact time killed Legionella pneumophila by a logarithm > 5.0.At ordinary temperature,the efficacy of the four disinfectants increased with increasing concentration and prolonging contact time.Conclusion At low concentrations,bromine-containing disinfectant,chlorine-containing disinfectant,peroxyacetic acid and double-chain quaternary ammonium salt have good efficacy in killing Legionella pneumophila.