T4、φχ174D和 f2三种噬菌体对戊二醛消毒剂抵抗力的比较研究

目的筛选出消毒实验中评价消毒因子对病毒灭活效果的指示噬茵体。方法比较研究噬菌体T4、ψX174D和f2对戊二醛消毒剂的抵抗力。消毒剂对噬菌体的灭活效果采用悬液定量灭活试验、中和剂鉴定试验、噬菌体的检测采用双层琼脂法。结果①3000mg／L的戊二醛对噬菌体T4作用20min,或6000mg／L的戊二醛对噬菌体T4作用5min即可达到消毒水平（对噬菌体T4的灭活对数值（LIV）或噬菌体T4的对数减少值CLRV）（log10No-log10Nt）≥4．00log10];②2500mg／L的戊二醛对噬菌体似174D作用20iln,或5000mg／L的戊二醛对噬菌体ψX174D作用5min达到消毒水平;③4000mg／L的戊二醛对噬菌体力作用40min,或8000mg／L的戊二醛对噬菌体,2作用10min达到消毒水平。结论上述三种噬菌体对戊二醛的抵抗力由强到弱为。噬菌体f2〉噬茵体T4〉噬菌体以ψX174D。

A comparative study on the resistance of bacteriophage T4, phiXM174D, and f2 to glutaraldehyde in laboratory]

OBJECTIVE: To identify the best indicative bacteriophage in disinfection tests through comparing the resistance of bacteriophage T4, phiX174D, and f2 to glutaraldehyde. METHODS: The virucidal activities of glutaraldehyde against bacteriophage T4, phiX174D, and f2 were assessed with suspension tests along with neutralizer tests. The double-agar-layer plaque technique was used to detect the bacteriophage T4, phiX174D, and f2. RESULTS: (1)In a condition of 3000 mg/L of glutaraldehyde and 20 minutes of contact or 6000 mg/L of glutaraldehyde and 5 minutes of contact, "disinfection" level for bacteriophage T4 was achieved, with the log10 inactivation value (LIV) or log10o reduction value (LRV) (=log10No-log10Nt) > or = 4. 00 log10. (2) In a condition of 2500 mg/L of glutaraldehyde and 20 minutes of contact or 5000 mg/L of glutaraldehyde and 5 minutes of contact, the LIV for bacteriophage phiX174D reached "disinfection" level; (3) In a condition of 4000 mg/L of glutaraldehyde and 40 minutes of contact or 8000 mg/L of glutaraldehyde and 10 minutes of contact, the LIV for bacteriophage f2 reached "disinfection" level. CONCLUSION: Bacteriophage f2 and bacteriophage phiX174D has the strongest and weakest resistance to glutaraldehyde respectively.