Abstract
the effective use of disinfectants constitute an important factor in preventing hospital acquired infections. this study was undertaken to compare the effects of three newly introduced disinfectants in a number of tertiary care hospitals in India, namely superoxidized water (SOW) and two quaternary ammonium compounds (QACs), against the effects of 70% ethyl alcohol as one of the most commonly used disinfectants. All the disinfectants were tested for their effectiveness against multidrug resistant (MDr) Pseudomonas aeruginosa, meticillin resistant Staphylococcus aureus (MrSA) and vancomycin resistant enterococci (Vre). Suspension of ≥10 6 bacteria was subjected to the action of different disinfectants for different length of time and in presence and absence of organic matter. reduction in colony count was noted by semiquantitative surface viable colony count method. results were expressed as percentage reductions and analyzed statistically. SOW showed good activity against most of the isolates, except against MrSA in presence of organic matter, where QACs were better. the disinfectants varied in their effects towards different organisms in different environmental conditions and with varying exposure time. therefore, disinfection policies should take into consideration the type of ward and surfaces to be disinfected along with reasons for disinfection for an effective step towards infection control.
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