Comparative Assessment of Antimicrobial Efficacy of Seven Surface Disinfectants against Eight Bacterial Strains in Saudi Arabia: An In Vitro Study

Abstract

Environmental conditions in hospitals facilitate the growth and spread of pathogenic bacteria on surfaces such as floors, bed rails, air ventilation units, and mobile elements. These pathogens may be eliminated with proper disinfecting processes, including the use of appropriate surface disinfectants. In this study, we aimed to evaluate of the antibacterial effects of seven surface disinfectants (HAMAYA, DAC, AJAX, Jif, Mr. MUSCLE, CLOROX, and BACTIL) against eight bacterial strains Klebsiella pneumoniae, Enterobacter aerogenes, Acinetobacter baumannii, Serratia marcescens, Escherichia coli, vancomycin-resistant Enterococcus faecalis-ATCC 51299, methicillin-resistant Staphylococcus aureus-ATCC 43300, and Pseudomonas aeruginosa-ATCC 1544, using two methods. The first was to determine the effective contact time of disinfectant against the tested bacterial strains, and the second was an assessment of the disinfection efficacy of each disinfectant on six types of contaminated surfaces with on a mixture of the eight tested bacterial strains. The results showed the efficacy of the disinfectants against the tested strains depending on the effective contact time. BACTIL disinfectant showed an efficacy of 100% against all tested strains at the end of the first minute of contact time. HAMAYA, DAC, Jif, Mr. MUSCLE, and CLOROX showed 100% efficiency at the end of the fourth, fifth, sixth, seventh, and fourteenth minutes, respectively, while AJAX disinfectant required nineteen minutes of contact time to show 100% efficacy against all tested strains.

Keywords

• antimicrobial efficacy
• surface disinfectants
• disinfection efficiency