AI Article Synopsis
- The study evaluated the effectiveness of household bleach, a sodium dichloroisocyanurate (NaDCC)-based disinfectant, and an eco-friendly cleaning agent (EFCA) on different strains of Staphylococcus aureus.
- Both bleach and NaDCC showed significant reduction of bacteria in suspension tests, but were less effective on surfaces, with bleach effectively eliminating specific biofilms only at high concentrations.
- The eco-friendly cleaning agent did not show any antimicrobial activity, raising concerns about the practical effectiveness of the disinfectants at recommended use dilutions, especially regarding biofilm eradication.
Article Abstract
The aim of this study was to determine the effect of household bleach, a sodium dichloroisocyanurate (NaDCC)-based disinfectant and an eco-friendly cleaning agent (EFCA) on four Staphylococcus aureus strains, including two isolated from community infections. The products were assessed using the suspension (EN 1276) and surface (EN 13697) tests, while biofilm activity was determined using the 96-well plate method. Bleach and NaDCC caused > 5 log reduction in viable counts within 5 min in suspension, whilst on surfaces the reduction was < 3 log. Bleach at 5000 ppm free available chlorine completely eradicated MSSA NCTC 13297 and PVL CA MSSA biofilms within 10 min, but not at 500 and 50 ppm, NaDCC was less effective against biofilms. The EFCA demonstrated no antimicrobial activity. It is of concern that at the recommended "use" dilution, bleach did not eradicate biofilms. Although increasing contact time and/or concentration should improve the activity, this may not be acceptable to the user.
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| http://dx.doi.org/10.1080/09603123.2014.903905 | DOI Listing |
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