Dr. Samuel Choudhury, a resident doctor in Singapore, revealed a common mistake many people make when using their toothbrush without realizing its potential health risks.
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In a video posted on Instagram, Choudhury explained that placing your toothbrush near the toilet exposes it to bacteria, viruses, and even airborne fecal particles. He explained that flushing the toilet can cause bacteria to rise up to 6 feet (about 1.83 meters) in the air, making the toothbrush vulnerable to these contaminants if placed near the toilet.
He emphasized that simply using a toothbrush cover doesn't protect it. In fact, it could increase bacteria growth due to the humid environment it creates.
Choudhury referenced a 2015 study on toothbrushes in student dorms, which found that 60% of them were contaminated with fecal matter, highlighting the widespread nature of the issue. He further explained that plastic covers, which many people believe protect their toothbrushes, may actually increase the risk of bacteria growth instead of preventing it.
To protect your toothbrush from contamination, Choudhury offered some practical advice:
Store the toothbrush vertically to ensure proper drainage of water and reduce moisture buildup.
Replace the toothbrush or its head every 3 to 4 months to maintain cleanliness and effectiveness.
Keep the toothbrush away from the toilet and close the lid when flushing to prevent airborne particles from spreading.
Store the toothbrush in a well-ventilated area to allow it to dry quickly, reducing bacteria growth.
As for UV sterilizers or mouthwash cleaning, Choudhury noted that these are not entirely necessary if the basic steps are followed.
This warning comes after scientific studies highlighted that flushing the toilet releases microscopic droplets containing bacteria such as E. coli and S. aureus, which can cause gastrointestinal infections or respiratory diseases if inhaled.
Dr. Wajid Ali, a researcher at the China University of Earth Sciences, confirmed that improving bathroom ventilation systems and strengthening exhaust fans can reduce the concentration of these particles in the air, contributing to public health protection.
