A recent study out of Northwestern University, led by Erica M. Hartmann, has uncovered an astounding diversity of previously unknown viruses on showerheads and toothbrushes. The new study, an offshoot of previous research dubbed “Operation Pottymouth”, used DNA sequencing to examine viruses living on samples submitted by volunteers, revealing these common bathroom items as unexpected hotspots of microbial biodiversity. The research identified over 600 different bacteriophages—viruses that infect bacteria—with little overlap between samples.
While this discovery might seem alarming, these viruses don’t target humans and could potentially be harnessed to combat antibiotic-resistant bacterial infections, particularly those caused by mycobacteria. Despite the findings, Hartmann advises against excessive use of disinfectants, suggesting simple cleaning methods and regular toothbrush replacement while emphasizing that most microbes are harmless and should be embraced rather than feared.