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Many people believe that public toilet seats are crawling with dangerous germs and are a cause of disease. However, dermatologists and microbiologists say that while bathrooms can harbor pathogens, toilet seats are rarely the main culprit.
“While bacteria do exist on toilet seats, most are harmless to humans, or they are microorganisms that only cause disease under certain conditions,” Dr. Chen Wei-di, a dermatologist in Taiwan and member of the American Academy of Dermatology, told The Epoch Times.
Other experts echo this view—the most significant threats in a restroom usually don’t come from sitting on a toilet seat—but from what lingers on other surfaces in the bathroom, or floats in the air after flushing.
Pathogens Worth Noting
Although uncommon, certain parasites, molds, bacteria, and viruses can survive in bathrooms under the right conditions.
Parasites and Mold
Dr. Huang Huilun, an attending physician at Ton-Yen General Hospital in Taiwan, told The Epoch Times that stubborn parasites, such as pubic lice and scabies, and ubiquitous molds, including tinea cruris and tinea corporis, can theoretically survive on the toilet seat and be transmitted to the next user.
Clostridium Difficile
A study published in 2024 in Scientific Reports found that the common pathogen Clostridium difficile can be widely spread in the air after flushing the toilet. Clostridium difficile can cause colon inflammation.
Gastrointestinal Viruses
Gastrointestinal viruses, such as norovirus, primarily attach to frequently touched surfaces, including flush handles or buttons, door handles, and faucets, and then enter the human body through the hands, Chen said.
E. coli and Salmonella
Human urine and feces can also harbor E. coli and Salmonella. When the toilet is flushed, microscopic droplets can carry these bacteria into the surrounding air. Both pathogens primarily spread through the fecal-oral route and can cause gastrointestinal illnesses, most commonly diarrhea.
Do Toilet Seats Spread Sexually Transmitted Diseases?
One of the most persistent public fears is the possibility of catching sexually transmitted diseases from a toilet seat. Experts say this worry is unfounded.
