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Oct 15, 2024

Hundreds Of Viruses Are On Your Toothbrush And Showerheads, Reveals Study

Hundreds Of Viruses Are On Your Toothbrush And Showerheads, Reveals Study (Image Credits: iStock)

A recent study revealed that everyday items like toothbrushes and showerheads may have hundreds of viruses. The research was conducted by Northwestern University and published in Frontiers in Microbiomes, which found hundreds of viruses living on these items. Despite being exposed to water and seemingly hygienic, toothbrushes and showerheads host unique populations of viruses and bacteria. The study analyzed over 90 showerhead and 30 toothbrush samples from various locations across the US. Using advanced DNA sequencing techniques, researchers identified thousands of microbes on these items.
Erica M. Hartmann, the lead researcher of the study shares, "The number of viruses we found is absolutely astonishing. We came across many that we knew very little about, and others that were completely new to science. It’s remarkable how much biodiversity exists all around us, even in places we don't usually think to look."
The study also revealed the presence of bacteriophages (viruses that infect bacteria) on both toothbrushes and showerheads. These bacteriophages play a crucial role in potentially impacting human health in ways that are not yet fully understood.
Compared to showerheads, toothbrushes were found to harbour a more diverse range of microbes. This variety likely stems from the toothbrush’s exposure to bacteria from the mouth, food particles, and other environmental microbes.
Hartmann shares that there was very little overlap between the types of viruses found on toothbrushes and those on showerheads. “Each sample was essentially its own little ecosystem," she explained. "The diversity of viruses on each toothbrush and showerhead shows just how much there is still to learn about the microbial world around us.”

Findings Of The Study

While the presence of viruses and bacteria on these bathroom items may seem concerning, Hartmann reassured that most of these microbes are harmless. "Microbes are everywhere, and the vast majority of them won't make us sick," she said. She warned against overusing disinfectants, as doing so could encourage microbes to develop resistance, potentially making them harder to treat in the future.
The findings of this study show the importance of understanding the microscopic world that surrounds us.
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