As global health professionals continue to orchestrate efforts to curb the spread of respiratory illnesses, such as the recurrent influenza virus and the ongoing COVID-19 pandemic, maintaining hand hygiene remains a significant conversation. The importance of health care professionals frequently washing their hands and encouraging the public to do the same has been widely communicated. However, less attention is given to the cleanliness of the places used for these necessary hygiene practices – the sinks.
Recent research out of Flinders University in South Australia has shed light on an often-overlooked aspect of health care-associated infections (HAIs). This research indicates that both hospital and residential sinks can be fertile breeding grounds for dangerous pathogens. These include microorganisms capable of causing severe diseases like pneumonia, wound infections, and even the dreaded Legionnaires’ disease, a severe pneumonia variant resulting from Legionella bacteria.
This critical health research emphasizes that hand basins may occupy a more significant role and present a higher risk to the spread of HAIs than previously assumed. The research also revealed a surprising element concerning residential sinks. These household basins showed not only a higher number of Legionella bacteria compared to hospital sinks but also a more diverse bacterial community.
Biofilms, the slimy substances that gracefully adorn sink drains, bowl edges, and faucet bases, have been discovered to be a key culprit in this issue. Far from being harmless gunk, they comprise layers of bacteria and pose considerable public health risks.
Given that handwashing sinks are publicly recognized as HAIs sources, impacting an estimated 7% of high-income and 15% of low- and middle-income hospital patients globally (according to the World Health Organization), understanding the bacterial diversity prevalent in sink biofilms in both homes and hospitals is crucial.
To this end, the Flinders University researchers analyzed 40 biofilm samples collected from the faucets and drains of nine hospital sinks and eleven residential sinks. They discovered the existence of more than a dozen potentially pathogenic bacteria, including Staphylococcus, which causes staph infections, and Vibrio, which is responsible for ailments such as cholera and rare flesh-eating infections.
Their study indicated that some of the identified bacteria aren’t typically found in water bodies. As a result, residential sinks recorded significantly higher levels of seven types of potentially harmful or corrosive bacteria. This scenario presents a pressing concern for patients receiving home-based health care, a model increasingly being adopted to decrease the strain on health facilities.
Currently, hospitals have infection control practices that incorporate routine sink cleaning. However, the task of informing patients about the correct methods of adequately disinfecting their home sinks might be a logistical challenge. The difficulty is heightened by the risk that dangerous microbes present in sink biofilms could fuel the rise of antimicrobial resistance.
Finally, it’s worth noting that kitchen and bathroom sinks in homes can potentially become bacterial hubspots given their high usage frequency for various hygiene practices. Ensuring a thorough, regular cleaning of these surfaces is critical, underlining the need to communicate the Centers for Disease Control and Prevention-approved three-step process to the public.
In infection prevention and control, every detail matters – down to the cleanliness of the sinks we clean our hands in. Going forward, we must make washing our sinks as routine as washing our hands.
Source: https://fortune.com/well/article/how-to-clean-sanitize-disinfect-bathroom-kitchen-sink/