McDonald's touchscreens test positive for feces, dangerous bacteria
A semi-scientific test of touchscreen kiosks in eight McDonald's restaurants in the U.K. have caused alarm that microbiologists say is unwarranted.
- The Metro newspaper conducted a semi-scientific test of touchscreen kiosks in eight McDonald's restaurants in the U.K.
- All of them tested positive for various kinds of bacteria that can cause infection.
- Public touchscreens are known to harbor high amounts of bacteria, though tests also suggest the average smartphone isn't much cleaner.
A new test suggests you should strive to avoid public touchscreens — unless you don't mind getting poop and other infection-causing bacteria on your fingers.
The Metro newspaper recently conducted a limited study that involved taking swab samples of touchscreen kiosks located within eight McDonald's restaurants in the U.K. All of the samples tested positive for some kind of bacteria that can potentially cause infection.
"We were all surprised how much gut and faecal bacteria there was on the touchscreen machines," Dr. Paul Matewele, senior lecturer in microbiology at London Metropolitan University, which helped analyze the samples, told the Metro. "These cause the kind of infections that people pick up in hospitals."
Some of the bacteria found were relatively common.
"For instance Enterococcus faecalis is part of the flora of gastrointestinal tracts of healthy humans and other mammals," Matewele said. "It is notorious in hospitals for causing hospital acquired infections."
But at least two samples tested positive for listeria, a rarer bacterium that's found found in human and animal feces, and which can lead to miscarriages and stillbirths.
"Listeria is another rare bacterium we were shocked to find on touchscreen machines as again this can be very contagious and a problem for those with a weak immune system," Matewele said.
The test also revealed the presence of the bacteria proteus, klebsiella and staphylococcus.
How dirty are touchscreens in general?
In short, pretty disgusting. You might have read reports (some more scientific than others) showing that airport touchscreen kiosks are actually dirtier than the "flush button" on airplane bathrooms, or similar tests showing that your keyboard is covered with an ungodly amount of germs.
But the worst offender is probably in your pocket. Ask yourself when's the last time you used a disinfectant on your smartphone. If you're like most people, it's probably not often enough, considering a University of Arizona study showed that smartphones are likely to carry 10 times the bacteria found on the average toilet seat. At least that's something you can fix.
As for public touchscreens, the solution is straightforward though it'll take a bit of effort: Always wash your hands after using one — especially if you're about to eat.
A McDonald's spokesperson told the Metro: "Our self-order screens are cleaned frequently throughout the day. All of our restaurants also provide facilities for customers to wash their hands before eating."
A more down-to-earth response
"These kinds of stories are irritating," David Coil, a microbiologist at the University of California at Davis, says to The Washington Post. "It's always something: kids' toys, doorknobs, touch screens. These are all the same objects touched by people. Of course there will be human-associated bacteria on them. Washing your hands more or less does the trick."
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Whether or not women think beards are sexy has to do with "moral disgust"
- A new study found that women perceive men with facial hair to be more attractive as well as physically and socially dominant.
- Women tend to associate more masculine faces with physical strength, social assertiveness, and formidability.
- Women who display higher levels of "moral disgust," or feelings of repugnance toward taboo behaviors, are more likely to prefer hairy faces.
Beards and perceptions of masculinity<img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yMjU5OTg0MC9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTY0NzkxMjM3N30.cH-GqNwP5GVqvstgJWAhBPn1B_lYpVEAI0I7iax7EQw/img.jpg?width=1245&coordinates=0%2C1900%2C0%2C849&height=700" id="caae6" class="rm-shortcode" data-rm-shortcode-id="cb0a355a4e8e1899789bc45f3f7aef56" data-rm-shortcode-name="rebelmouse-image" />
Photo Credit: Wikimedia<p>The study used 919 American (mostly white) women ages 18-70 who rated 30 pictures of men they were shown with various stages of facial hair growth. The photographs depicted men with faces that had been digitally altered to look more feminine or more masculine, with a beard and without a beard. The women rated the men according to perceived attractiveness for long-term and short-term relationships. The study found that the more facial hair the men had, the higher the men were rated on their attractiveness, particularly for their suitability for a long-term relationship.</p><p>Part of this might be attributed to facial masculinity — i.e. protruding brow ridge, wide cheekbones, thick jawline, and deeply set narrow eyes — which conveys information to a woman about a man's underlying health and formidability. Women tend to associate more masculine faces with physical strength and social assertiveness. It can also indicate a man with a superior immune response. The researchers suggested that their findings favoring bearded men could be due to the fact that facial hair enhances the masculine facial features on a man's face, like creating the illusion of a thicker jaw line. This could communicate direct benefits to women like resources and protection that would enhance survival among mothers and their infants. In other words, while a beard doesn't mean superior genetics in and of itself, it might be a primitive, ornamental way of saying, "Hey girl, I'm a testosterone-fueled lean, mean, pathogen fighting machine." <br></p><p>It could also be that a beard becomes its own destiny. The researchers in this study cite prior research that found that by growing a beard, men felt more masculine and had higher levels of serum testosterone, which was linked to a higher level of social dominance. They also tended to subscribe to more old-school beliefs about gender roles in their relationships with women as compared to men with clean-shaven faces.<span></span><br></p>
What does disgust have to do with beard preference?<p>Obviously, not all women dig beards. The researchers were particularly interested in what traits make a women prefer bearded men over clean-shaven faces. They looked into several factors including a woman's disgust levels on various concepts, her desire to become pregnant, and her exposure to facial hair in her personal life. </p><p>According to the study, women who were not into facial hair were turned-off by potential parasites or other critters they imagined could be in the hair or skin. Women ranking high on this "ectoparasite disgust" scale might have viewed beards as a sign of poor grooming habits. However, women who ranked higher in levels of "pathogen" did find the bearded men to be desirable, possibly because they perceived beards as a signal of good health and immune function. An intriguing discovery in the study was links to morality. Women who displayed higher levels of "moral disgust," or feelings of repugnance toward taboo behaviors, were more likely to prefer hairy faces. The authors opined that this could reflect a link between beardedness, politically conservative outlooks, and traditional views regarding performances of masculinity in heterosexual relationships.</p>
Additional findings<img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yMjU5OTg1My9vcmlnaW4uZ2lmIiwiZXhwaXJlc19hdCI6MTYyNDI1NjUyOX0.P9B8WbmJR0q4nfzYZKbuNSA-2SAigVWJgrQE-_Gxlds/img.gif?width=980" id="49143" class="rm-shortcode" data-rm-shortcode-id="2ed3b1d6f20fc170bf2974646e565e8d" data-rm-shortcode-name="rebelmouse-image" />Giphy<p>The correlations that existed between married and single women's rating on the attractiveness of beards were not particularly clear, although the researchers noted that single and married women who wanted children tended to find beards more attractive than the women who didn't want children. They also found that women with bearded husbands found beards to be more attractive, which might indicate that social exposure to beards influences how desirable they are perceived of as being. Or it could be that men with wives who like beards grow beards.</p><p>It's important to note that culture plays a huge role in how attractive women perceive certain male characteristics as being. This study looked at a small, culturally specific group of American women, so no big, universal claims should be made about masculinity, facial hair, and male desirability to women. However, research like this is important in highlighting how human grooming decisions are driven by much more than fashion trends. Sociobiological, economic, and ecological factors all play a part in the way we choose to present ourselves.</p>
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