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Bacterial Efficacy of ClO2 as Compared to NaClO
Summary
In this study, we evaluated the antibacterial activity of chlorine dioxide (ClO2) compared with sodium hypochlorite (NaClO) on various multidrug-resistant strains in the presence of bovine serum albumin and sheep erythrocytes to mimic the frequent blood contamination in clinical environment. The 3 most important species causing nosocomial infections, i.e., methicillin-resistant Staphylococcus aureus (MRSA), multidrug-resistant Pseudomonas aeruginosa (MDRP) and multidrug-resistant Acinetobacter baumannii (MDRA) were evaluated, with 3 representative strains from each. At a 10 ppm-concentration, ClO2 drastically reduced the number of all MDRP and MDRA, and 2 out of 3 MRSA strains, but NaClO was unable to cause any remarkable attenuation for any of the 9 strains tested in 60 seconds. Increased concentration of 100 ppm enabled ClO2 to completely kill MRSA strains, whereas NaClO failed to significantly lower the number of 2 MRSA and 1 MDRA strains.
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