Should shoes be allowed inside houses?

Should shoes be allowed inside houses?
Should shoes be allowed inside houses?

On an average, one shoe carries hundreds of thousands of bacteria per square inch, according to a study. This brings us to a question – should you allow guests to remove their shoes inside your houses?

As per a recent survey, Live Science carried out an analysis about shoe bacteria and whether it is something people need to worry about in their homes.

An environmental microbiologist and research specialist, Jonathan Sexton from the University of Arizona said that an average shoe harbours hundreds of thousands of bacteria per square inch.

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The soles of our shoes are essentially a meet and greet for these microbes, and with each step we take, we pick up new attendants. “Pretty much wherever you go, you’re going to be picking up stuff,” Sexton said.

But what types of bacteria are there on our shoes? Do they pose a legitimate health threat? Previous studies suggest that almost all shoes in some research samples were coated with faecal bacteria, including one prominent bug called Escherichia coli (E.coli), which researchers discovered on 96 per cent of shoe soles. While many types of E.coli are harmless to humans, some strains can cause severe diarrhoea, urinary tract infections and even meningitis.

Other research studies have also found evidence of things like Staphylococcus aureus, which underlies a wide range of skin infections, and more worryingly, infections of the blood and the heart. Another study sampled 30 households for the presence of Clostridium difficile (C. difficile), a bacterium with a long lifespan that commonly causes bowel problems like diarrhoea.

However, there is nothing much to worry about as the research by Live Science suggests that the load of bacteria our shoes bring indoors isn’t typically high enough to make the average healthy person very sick.

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“For a healthy individual, bacteria on shoes likely pose no or minimal risk,” said Kevin Garey, a professor at the University of Houston College of Pharmacy.

Another point is that most of us don’t spend a lot of time on the ground, where shoe bacteria dwell. “The exposure makes the poison. So if you’re not exposed to it, you’re not going to get sick from it,” Sexton said. In some cases, layers of bacteria coating the floor can become “re-aerosolized” and enter the air we breathe, lifted by the draft from a window, for instance, Sexton explained.

“I’d be more worried about a child crawling around on the floor. For a healthy adult, it’s not too big of an issue,” Sexton said.

People, who are immunocompromised, meaning their defences against infection, are lower than usual, need to be cautious.

“In a person who is at risk for infections – usually someone recently hospitalized – attention to good household cleaning can be important,” said Garey.

“it would be a good idea to take your outdoor shoes off when you enter your home,” if you are at risk of infection or have a child at home, Garey said.

Henceforth, shoe bacteria don’t pose an immediate risk. And it’s worth remembering that bacteria exist elsewhere than on our shoes.

“Healthy bacteria in our gut, skin and elsewhere keep us healthy and protect us from other bacteria that can cause us illness. I don’t think everyone appreciates that some bacteria are also good for us,” Garey said.


(With inputs from ANI)

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