Biofilms in the sink as breeding grounds for pathogens

August 2024

A recent study by Flinders University in Australia shows that sinks in private households and hospitals harbour dangerous microbes that can lead to serious infections such as pneumonia and Legionnaires' disease. What is particularly alarming is that the diversity of bacteria in private households is greater than in hospitals.

Sinks are not only an everyday part of our households, they are also potential breeding grounds for dangerous microbes. According to Flinders University, so-called biofilms, slimy coatings of microorganisms that can cause serious infections, form in the drains and around the taps. These microbes not only originate from the water, but are often introduced by patients or staff washing their hands.

Surprising findings from the study
The study, published in the journal Science of the Total Environment, reveals that washbasins in private households have a greater diversity of bacteria than those in hospitals. Of particular concern is the higher presence of Legionella bacteria in household samples, which can cause the dangerous Legionnaires’ disease. These bacteria thrive in hot water systems and pose a significant health risk.

Hygiene measures: Key to infection prevention
The study underlines the importance of thorough cleaning and disinfection measures in washrooms in order to minimise the risk of infection. This is particularly crucial in hospitals, where patients with weakened immune systems are cared for. However, washroom hygiene should also not be neglected in private households, especially in home care.

Harriet Whiley, Associate Professor at Flinders University, emphasises that regular and thorough cleaning is necessary to prevent the formation of biofilms and thus protect people’s health.

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