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Hot air hand dryers spread bathroom bacteria study shows (2018-04-24)

Bathroom hot air hand dryers deposited large quantities of bacteria on agar plates held beneath the nozzles for 30 seconds and grew 15 to 60 bacterial colonies each, according to research published in Applied and Environmental Microbiology, a publication of the American Society for Microbiology.

The vast majority of the bacteria appear to come from the bathrooms.

Bacteria deposited by hand dryers are skin flora and/or environmental organisms that can cause invasive human disease, including bloodstream, ocular, and peritoneal infections.

In most cases, patients sickened by these bacteria had a vulnerability to infection because of factors such as a permanent catheter, an immunodeficiency, chronic disease, or IV drug use.

For more information
Applied and Environmental Microbiology
Deposition of Bacteria and Bacterial Spores by Bathroom Hot Air Hand Dryers