Don't be so clean! Obsession with hygiene could kill benefial bacterias

February 20, 2017

New Delhi, Feb 20: Good news for all those lazy-headed not-really-a-cleanliness-freak out there! Scientists have found out that the obsession with hygiene could even be turning some beneficial bacteria found in the human gut into "endangered species".

water

Providing clean water to everyone on the planet has been a major health goal for decades, but scientists have warned that while it reduces the chance of catching a deadly disease it could also increase the risk of asthma.

Speaking at the annual meeting of the American Association for the Advancement of Science in Boston, Dr Brett Finlay suggested the obsession with hygiene could even be turning some beneficial bacteria found in the human gut into "endangered species".

In a study in Canada, the researchers had found the presence of four types of bacteria in the gut of babies less than 100 days old seemed to prevent them from developing asthma in later life.

They then decided to see if the same was true for children elsewhere in the world and settled on Ecuador, where about 10 per cent of children have asthma, for their next study.

They found the same protective effect of the four bugs, but also two unexpected factors that increased the risk of the condition: a particular type of yeast in the gut and access to a clean water supply.

Dr Finley, of British Columbia University, said: "Ironically the kids with clean water had a higher risk of asthma.

"I guess it makes sense [because of the lower levels of bacteria] but I must admit we were surprised to see that. You'd think clean water is good for the world."

The hygiene hypothesis has emerged as one reason to explain the rise of asthma and allergies in the developed world.

But despite this Dr Finlay, author of the book Let Them Eat Dirt, said too many people still felt the need to kill bugs and urged them to throw away their anti-bacterial wipes.

"I would say we're suffering from a hygiene hangover. We have cleaned the world up too much," he said.

"Maybe these microbes are actually an endangered species - your great grandkids are going to have different microbes than you do.

"There are people biobanking things - I'm not suggesting you should biobank your poop now and give it to your grandkids .. I don't know . I worry we have got too clean and we have got to ease off a little bit.

"We have evolved with these microbe all along.

"I do think we have to rethink this absolute war on all microbes - 'kill them all, carpet bomb them' - I think that's wrong."

However, he stressed there were benefits to being clean.

"Hygiene works - we have got rid of infectious diseases, no doubt about it, but this is a consequence of that," he said.

"Certain microbes fix one condition but make another worse . so it's complex."

While the role of gut microbes in human health is now widely accepted, Dr Finlay said when they first suggested a link between their make-up and asthma "people thought we were from Mars".

"These microbes in the gut are setting the immune system up and different parts of the body talk to each other," he said.

But now research was increasingly pointing to the role of fungi like yeast in the gut and even "the

other elephant in the room", viruses.

"This is just a wake-up call - we have to think about more than bacteria," he said.

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Agencies
January 5,2020

Washington D.C., Jan 5: After a woman filed a lawsuit against a diet soda company, the California court has declared that the beverage does not promise to help buyers in losing weight.

The woman had gulped down the drink for over a decade but did not lose inches as a result.

The three-judge panel declared during the hearing: "The prevalent understanding of the term in (the marketplace) is that the 'diet' version of a soft drink has fewer calories than its 'regular' counterpart."

However, the members of the US 9th circuit court have felt that the consumers tend to make out something of their own that is unreasonable and eventually hamper the reputation of brands through a deceptive allegation, reports Fox News.

The response was due to a misleading case filed against Diet Dr Pepper by Shana Becerra from Santa Rosa, California. Shana claimed that she has been addictively purchasing the low-calorie beverage for the past 13 years hoping for losing some fat but failed to lose even a single inch.

The woman also stated that the attractive and fit models misled her into believing that drink will help her in perfecting her body like them.

However, the court's decision was that advertisements are for representational purposes only. "Cannot be reasonably understood to convey any specific meaning at all," as written by Judge Jay Bybee.

Shana had last week made such allegation against Diet coke as well where the court came to a similar verdict. She claimed that she had found various studies where it is evident that the artificial sweetener aspartame used in diet beverages actually boosts weight gain.

But the artificial sweetener is approved in by the concerned administrative department and thus is used in most American drinks.

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Agencies
June 20,2020

The World Health Organisation has warned that the COVID-19 pandemic is entering a "new and dangerous" phase. Thursday saw the most cases in a single day reported to the WHO.

Tedros Adhanom Ghebreyesus said the day had seen 150,000 new cases with half of those coming from the Americas and large numbers also from the Middle East and South Asia, the BBC reported.

He said the virus was still spreading fast and the pandemic accelerating.

He acknowledged people might be fed up with self-isolating and countries were eager to open their economies but he said that now was a time for extreme vigilance.

Maria van Kerkhove, technical lead of the WHO's COVID-19 response, told a press conference the pandemic is "accelerating in many parts of the world".

"While we have seen countries have some success in suppressing transmission and bringing transition down to a low level, every country must remain ready," she said.

Mike Ryan, the head of the WHO's Health Emergencies Programme, said that some countries had managed to flatten the peak of infections without bringing them down to a very low level.

"You can see a situation in some countries where they could get a second peak now, because the disease has not been brought under control," he said.

"The disease will then go away and reduce to a low level, and they could then get a second wave again in the autumn or later in the year."

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Agencies
June 21,2020

Lower neighbourhood socioeconomic status and greater household crowding increase the risk of becoming infected with SARS-CoV-2, the virus that causes COVID-19, warn researchers.

"Our study shows that neighbourhood socioeconomic status and household crowding are strongly associated with risk of infection," said study lead author Alexander Melamed from Columbia University in the US.

"This may explain why Black and Hispanic people living in these neighbourhoods are disproportionately at risk for contracting the virus," Melamed added.

For the findings, published in the journal JAMA, the researchers examined the relationships between COVID-19 infection and neighbourhood characteristics in 396 women who gave birth during the peak of the Covid-19 outbreak in New York City. Since March 22, all women admitted to the hospitals for delivery have been tested for the virus, which gave the researchers the opportunity to detect all infections -- including infections with no symptoms -- in a defined population

The strongest predictor of COVID-19 infection among these women was residence in a neighbourhood where households with many people are common.The findings showed that women who lived in a neighbourhood with high household membership were three times more likely to be infected with the virus. Neighbourhood poverty also appeared to be a factor, the researchers said.Women were twice as likely to get COVID-19 if they lived in neighbourhoods with a high poverty rate, although that relationship was not statistically significant due to the small sample size.

The study revealed that there was no association between infection and population density.

"New York City has the highest population density of any city in the US, but our study found that the risks are related more to density in people's domestic environments rather than density in the city or within neighbourhoods," says co-author Cynthia Gyamfi-Bannerman."

The knowledge that SARS-CoV-2 infection rates are higher in disadvantaged neighbourhoods and among people who live in crowded households could help public health officials target preventive measures," the authors wrote.

Recently, another study published in the Journal of the American Planning Association, showed that dense areas were associated with lower COVID-19 death rates.

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