Showerhead bacteria and lung infections: Researchers find correlation

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Researchers from the University of Colorado, Boulder have now shown that the regions in the United States where pathogenic mycobacteria are most prevalent in showerheads are the same regions where nontuberculous mycobacterial (NTM) lung infections are most common. The study, published in the journal, mBio, emphasizes the important role of showerheads in the transmission of NTM infections.
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The researchers surveyed showerheads in households across the United States and Europe and found that showerheads “often harbor abundant mycobacterial communities that vary in composition depending on geographic location, water chemistry, and water source,” according to the study. Households that received water treated with chlorine disinfectants had particularly high abundances of certain mycobacteria.

Their results highlight the public health relevance of mycobacteria in showerhead bio?lms and advance our understanding of NTM transmission dynamics. This study demonstrates that mycobacterial distributions in showerhead bio?lms are often predictable from household location and water chemistry. The results will help develop strategies to reduce exposures to these emerging pathogens.

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