A recent study reveals that chlorine disinfectant, regularly utilized in hospitals as a safeguard against infections, is no more effective than water when battling the dangerous superbug Clostridioides difficile (C.diff). Published in the respected journal ‘Infection Control and Hospital Epidemiology’, the research was led by the University of Leicester team.
C.diff is a strain of bacteria known for causing significant bowel complications, including severe diarrhea and colitis. Chlorine disinfectant, with its wide use in places such as hospitals, quarantine areas for COVID-19, homes, educational bodies, and public areas, has been a go-to weapon in the fight against the spread of the novel coronavirus and similar pathogens. Its potency against viruses on a variety of surfaces is highly valued. Nonetheless, this pivotal study indicates that chlorine disinfectant fails to reduce the number of viable C.diff spores, a dormant, resistant form of the bacterium, that can survive for extended periods on surfaces, leading to infections.
The research engaged different concentrations of chlorine disinfectant, varying the contact times from a quick 10 seconds to as much as 60 minutes. The researchers meticulously tracked the number of viable spores that endured post-treatment. Digging into the study’s results, it is evident that chlorine disinfectant, despite the use of high concentrations and prolonged exposure, could not noticeably decrease the number of viable spores. Astonishingly, water demonstrated the same efficiency level as the chlorine disinfectant in eliminating C.diff spores.
This revelation has profound implications for the approaches to infection prevention and control in healthcare settings. C.diff is recognized as one of the primary culprits behind healthcare-related infections globally. Data from the Centers for Disease Control and Prevention (CDC) reveal that in 2017, nearly half a million people in the United States endured C.diff infections, with a frightening 29,000 associated deaths. These infections are not just a health concern but also a financial burden, leading to extended hospital stay durations, and skyrocketing the demand for antibiotics and isolation measures.
The primary takeaway from the study is that chlorine disinfectant might not be the solution for curbing the transmission of C.diff spores in medical facilities, necessitating the exploration of alternative disinfecting methods or substances. The researchers advocate carrying out additional studies to examine the efficacy of other disinfectants, such as peracetic acid, hydrogen peroxide, or UV light, against these resilient spores. They also highlight the importance of supplementing environmental cleaning practices with robust strategies like contact precautions, stringent hand hygiene, and judicious antibiotic use to mitigate infection risks. There are, however, some limitations to the study.
The research took place in a lab environment, which might not entirely represent real-world conditions, including factors like the presence of organic matter that could interfere with the disinfection efficacy. They only examined a single strain of C.diff, and it stands to reason that other strains could show varying resistance degrees to the chlorine disinfectant. Additionally, they solely assessed the viability of C.diff spores, not taking into account their potential to germinate and trigger infections.
Nevertheless, the team acknowledges these caveats and urges more comprehensive research in real-world clinical settings and with various C.diff strains. They also recommend evaluating how C.diff spore resistance to chlorine disinfectant occurs and examining the sporicidal impact of chlorine when combined with other agents like enzymes or surfactants.