The sporicidal activity of hospital disinfectants was tested using two methods of test and two species of spores. Alcoholic hypochlorite and glutaraldehyde (Cidex) showed some sporicidal activity; the first was the more effective. Iodophors, formalin, and phenolics were less effective, in descending order. Chlorhexidine showed no activity.
A freshly prepared solution containing 50% methanol and sufficient sodium hypochlorite to provide 2000 parts per million available chlorine in distilled water, with a contact time of 15 minutes, is suggested for the decontamination of clean, heat-sensitive instruments except those of plated metal. It must be understood that no such method can be depended upon to sterilize.
The instruments should be rinsed in sterile water before use after decontamination.
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