Healthcare-associated infections (HAIs) are an important, potentially preventable reason to maintain a clean healthcare environment. However, guidelines from Europe and North America do not concur—European guidelines recommend using neutral detergent (followed by chlorine-based disinfection (CBD) if required), whilst North American guidelines recommend using detergent or hospital-grade disinfectant-detergents for routine cleaning or decontamination of noncritical healthcare environmental surfaces. The objective of this study was to compare the effectiveness on rates of HAIs of: (i) disinfectant-detergents versus detergents; and (ii) the active ingredient of many disinfectant-detergents—quaternary ammonium compounds (QAC)—versus CBD.

A rapid review of systematic reviews was conducted using the following search terms: keywords and controlled vocabulary terms for the concepts of “healthcare environmental surfaces” AND (“QAC-based disinfectants” OR “disinfectant-detergents” OR “decontamination”) AND (“environmental contamination” OR “colonization” OR “HAIs”). The search filters included systematic reviews, guidelines, and technology reports. The following databases were searched: The Cochrane Library; PubMed; and health technology assessment and guideline websites for gray literature. Systematic reviews of studies comparing the effects of disinfectant-detergents with detergent, or comparing QAC with CBD, on rates of HAIs in the healthcare environment were included. Reviews on the cleaning or disinfection of body surfaces or disinfection of invasive medical devices were excluded. Quality assessment was not conducted. Data extraction was performed using a pro forma.

The literature search resulted in 356 titles. From ninety-four potentially relevant abstracts, fifty-seven full-texts were evaluated: fifty-one were excluded (eight non-English) and six were included. All review authors cautioned that the evidence was low level, methodologically poor, subject to confounding, and didn't address adverse outcomes. The reviews identified eight relevant primary studies, three of which compared disinfectant-detergents with detergent and found no difference in rates of HAI. Five studies compared QAC with CBD. All five demonstrated that CBD was superior to QAC and reduced Clostridium difficile infection rates in outbreak contexts. Furthermore, QAC may induce sporulation and microbial resistance.

Low-level evidence suggested that: there is no advantage in using disinfectant-detergents for routine cleaning of noncritical surfaces; CBD is superior to QAC-based disinfection in reducing clostridial infections; and QAC agents may induce sporulation or microbial resistance.