Hand washing forms communities of bacteria living in water pipes

In the largest study of bacteria found in sinks outside hospitals, scientists from the University

Reading discovered communities of similar bacteria that mostly remain in our sewer pipes after washing our hands.

The researchers found that there aresignificant differences between families of dominant bacteria, depending on the location of the sinks in the sink. It has also been found that plumbing systems such as P-trap or U-bend provide ideal conditions for bacteria to grow.

Not only is it important to wash your hands to combat coronavirus transmission, but it's also important to properly design sinks that are cleaned regularly. 

Dr Hyun Soon Gweon, Lecturer in Bioinformatics for Genomics at the University of Reading

To figure out the extent of the problem, the authors took samples from 123 sinks in toilets and bathrooms and showed that sinks have a distinct microbiome dominated by certain bacteria.

Found in the water supply area under the sinksmicrobial communities dominated by a group of bacteria called Proteobacteria. This type includes pathogens such as salmonella and E. coli, which can cause serious illness. It is noted that the proportion of bacteria from this family was low.

Higher concentrations of the bacteria Moraxellaceae and Burkholderiaceae have also been found, which can cause infections, but are mostly harmless to humans.

P-trap shells contain more Burkholderiaceae bacteria.

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