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Research suggests that keeping outdoor shoes on inside the home may bring far more than just dirt across the threshold. Scientists have found that shoe soles can carry bacteria, chemicals, allergens, and other contaminants from streets, parks, workplaces, and stores directly into living spaces.
For many people, whether guests should remove their shoes indoors is a matter of personal preference or cultural tradition. However, growing evidence indicates there are compelling hygiene reasons to leave outdoor footwear at the door.
Every day, shoes come into contact with a wide range of surfaces contaminated with germs, pollutants, animal waste, and microscopic particles. These substances can cling to shoe soles and be transferred onto floors, carpets, and other household surfaces.
According to reports citing scientific research, more than half of the dust found inside homes may originate outdoors, with a significant portion tracked in on street shoes. Along with ordinary dirt, footwear can carry potentially harmful chemicals, including substances linked to an increased risk of cancer.
Researchers have also identified several potentially dangerous bacteria on shoe soles. One of the most concerning is Clostridioides difficile, a highly contagious bacterium that can cause severe intestinal infections and persistent diarrhea. In serious cases, such infections can become life-threatening, particularly among older adults and people with weakened immune systems.
Studies have detected Clostridioides difficile on more than one-quarter of examined shoe soles, highlighting how easily harmful microorganisms can enter homes.
The risks do not end there. Scientists have also found Escherichia coli (E. coli) and staphylococcal bacteria on footwear. These microbes are associated with a range of illnesses, including urinary tract infections, skin infections, and, in some cases, pneumonia.
Health experts note that the risk is especially relevant in households with young children, who spend more time crawling and playing on floors, as well as for elderly residents and individuals with compromised immune systems.
The takeaway is simple: while taking off shoes indoors may seem like a small habit, it can help reduce the amount of dirt, bacteria, allergens, and potentially harmful substances entering the home. For those looking to improve household hygiene with minimal effort, leaving outdoor shoes by the door appears to be a sensible step.
- source: heute.at/picture:
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