Hospital Sanitation: the Massive Bacterial Contamination of the Wet Mop

Abstract

Following the demonstration of massive spread of bacterial contamination throughout the hospital by the wet-mopping techniques in use, quantitative studies were undertaken to determine the source of contamination and to institute measures of control. It was found that mops, stored wet, supported bacterial growth to very high levels and could not be adequately decontaminated by chemical disinfection. Laundering and adequate drying provided effective decontamination, but build-up of bacterial counts occurred if mops were not changed daily or if disinfectant was omitted from the wash-water. Recommendations were based upon the experimental findings.

Hospital Surface Disinfection: Need, Gaps, Challenges and Management for "Basin and Mop" Method

“…Mops and reusable cleaning cloths are regularly used to achieve low-level disinfection on environmental surfaces. However, they often are not adequately cleaned and disinfected, and if the water-disinfectant mixture is not changed regularly (e.g., after every three to four rooms, at no longer than 60-minute intervals), the mopping procedure actually can spread heavy microbial contamination throughout the health-care facility [8]. Westwood and Mitchell also found that standard laundering provided acceptable decontamination of heavily contaminated mop heads, but chemical disinfection with a phenolic products was less effective.…”