Results indicated that not only can dogs detect Covid faster, but they can also do so in a non-intrusive manner – so no need to swab your throat or nose
Dogs can detect Covid-19 faster and more accurately than a PCR test, a new study shows.
Researchers looked at the ability of canines to recognise the virus and its variants, even when they are obscured by other viruses, like those from common colds and flu.
More than 400 scientists from over 30 countries contributed to the study as well as 147 scent dogs, according to the findings published in the Journal of Osteopathic Medicine.
After analysing many studies covering both field and clinical experiments, Professor Dickey and Junqueira found that dogs who are trained to sniff out scents are “as effective and often more effective” than antigen tests.
A total of 53 dogs were trained to sniff out Covid scents, while 37 were not and scientists found that the dogs that were not trained were in some cases “slightly superior” to those that were pre-trained.
“The previously untrained dogs have the advantage that they are not as prone to indicating on scents other than the Covid–19 associated scent,” the paper said.
The results indicated that not only can dogs detect Covid faster, but they can also do so in a non-intrusive manner. This means you won’t need to put a swab in your throat or nose.
How can dogs detect the virus?
This essentially comes down to the dog’s highly evolved nose with its ability to sense out smells quicker.
Dogs possess up to 300 million olfactory receptors in their noses, compared to about six million in humans. And the part of a dog’s brain that is devoted to analysing smells is about “40 times greater” than humans. Canines also have ‘neophilia’, which means they are attracted to new and interesting odours
And so, with all these enhancements, dogs can detect very low concentrations of odours associated with Covid infections.
“They can detect the equivalent of one drop of an odorous substance in 10.5 Olympic-sized swimming pools,” Professor Dickey said. “For perspective, this is about three orders of magnitude better than with scientific instrumentation.”
Scientists also found that in some cases, the animals were also able to detect the virus in pre-symptomatic and asymptomatic patients, “whose viral load was too low for conventional tests to work.”
Professor Dickey has said that dogs can also differentiate Covid and its different variants in the presence of other respiratory viruses. This included the common cold or flu.
“They’re much more effective. In fact, one of the authors that we quote in the paper commented that the RT-PCR test is not the gold standard anymore. It’s the dog. And they’re so quick,” he added. “They can give you the yes or no within seconds if they’re directly smelling you.”
How was the study conducted to see if dogs can really detect Covid-19?
In some studies, the dogs gave a person a quick sniff, sitting down to see if the person has Covid. In another study, the dog was given a sweat sample to smell for a few minutes.
The press release has said that scent dogs, such as beagles, basset hounds and coonhounds are the ideal candidates for sniffing out the virus, given their “natural tendencies to rely on odours to relate to the world.”
But the studies which the researchers analysed showed a variety of dogs were up for the challenge and were able to sniff out the Covid odour. With a few weeks of training, puppies, older dogs, purebred and mixed breeds, both male and female were able to sniff such odours out and “all performed admirably,” the Eureka Alert press release said.
Although there has been success with dogs detecting such viruses, researchers believe there are still many challenges with using dogs for medical diagnoses.
“There’s quite a bit of research, but it’s still considered by many as a kind of a curiosity,” said Professor Dickey.
In conclusion, Professor Dickey and Junqueira said after reviewing the studies, believe that scent dogs deserve “their place as a serious diagnostic methodology that could be particularly useful during future pandemics, potentially as part of rapid routine health screenings in public spaces.”
“Perhaps, most importantly, we argue that the impressive international quality and quantity of COVID scent dog research described in our paper for the first time, demonstrates that medical scent dogs are finally ready for a host of mainstream medical applications,” they added.
15 Things Moms Do That Make Them Even More Incredible
Each pregnancy alters your body irrevocably. And we don’t mean the stretch marks or the scars. We mean the forever-changed DNA. Ask any new mother and she’ll list out a litany of things that are now different for her. Like a forgetful mommy brain that, according to science, makes the mother-child bond stronger.
We at Bright Side salute all moms and believe that they are real-life superheroes. To honor all mothers, we found some mommy facts proving there’s nothing like a mother’s love. Or the science behind it.
1. Motherhood changes you, and your DNA.
A chimera is a legendary beast made of different animals. And we are likening mothers to chimeras because every child that a mother carries leaves their DNA inside her. Basically, fetal cells enter a mother’s bloodstream and stay in her body forever. Researchers allege that these cells can affect the mother both positively and negatively. On one hand, it can speed up healing but on the flip side, it can increase the risk of cancer.
So when they say motherhood changes you, it does so at an elemental level as well. Jennifer Garner’s stunning countenance reflects just that.
2. The baby can taste what their mother eats.
Studies show that what a mother eats flavors the amniotic fluid. Something a baby gulps down several times a day. Basically, a baby can taste what their mother eats from within the womb.
A study showed that infants whose mothers ate carrots while pregnant seemed to enjoy cereal prepared with carrot juice more than others. So if you want to develop your baby’s palate for healthy, crunchy veggies, chow down on them while you are pregnant.
3. Kissing babies is more “healing” than we think.
Any new mom will tell you that the urge to kiss a newborn is intense. It’s innate and biological in nature. And science says that when mothers kiss their babies, it’s not just love, it’s medicine.
A mother’s body samples the pathogens found on the baby’s face, and more magic happens within her own body. Especially to her breastmilk, the main source of nutrition and immunity for the baby.
4. Pregnant women make enormous amounts of estrogen.
Pregnancy sends a woman’s body into overdrive. The uterus expands to 500 times its normal size and then shrinks back after birth. The blood volume increases and to tackle that, the heart expands a little too.
And it’s not just this, a woman makes more estrogen in a single pregnancy than she would in her whole lifetime if she never got pregnant. There’s a reason why women are exhausted when expecting and need sleep and rest for a healthy delivery and recovery.
5. A mother’s smile is near magical.
Moms are near magic, and so is their smile or affection. While you need your mother at all ages, it’s the helpless infant who is most dependent on their mom.
Studies show that when mothers smile, coo, and show affection to their babies, their heartbeats synchronize into the same beat. So if a baby is distressed, it calms them down. This is the reason why newborns need mothers the most when they are fussy and refuse to be calmed down by other family members.
6. Carrying boys can make you more nauseous.
There’s a reason why little boys are made of “snips and snails and puppy dog tails” or so goes the nursery rhyme. This is because mothers who carry boys are more likely to be nauseous in the first and second trimesters, a study shows.
This is not to say that women expecting girls cannot have morning sickness or that all women who carry boys have more nausea. It’s just that if you are expecting a boy, chances are you may experience more nausea or food aversions.
7. Babies name their mamas.
“Mom, mama, mummy, mamma, ammi, ma, me, emi, mimi.” There’s a pattern in the name for mother in all languages and this is because the “em” sounds are usually the first vocalization for a baby. It’s also the easiest sound a baby can make while babbling. And so it’s our babies who name us and call us mamas.
8. The mommy brain fog is very real.
If you see new moms looking lost, there’s a scientific reason for this. Each pregnancy affects a woman’s brain and makes her lose gray matter. The effects last for around 2 years. Science says that this temporary bewilderment makes mothers closer to their babies as well.
That said, the gray matter regenerates and any confusion or forgetfulness is passing. The bond between a mother and her child is permanent.
9. A mother’s voice is as soothing as a hug.
A study has shown that a mother’s voice, even on the telephone, is as calming as a hug. Researchers introduced stress to a group of girls and then had 1/3 of them hug their mothers, another 1/3 of them talk to their mothers, and 1/3 watched an emotionally neutral film. The girls who spoke to their mothers calmed down much faster, just like those who hugged.
This proves that if you are under stress, your mother’s voice can flood oxytocin into your bloodstream, making you feel better. And we think Jennifer Garner already knows that, pictured here with her mother.
10. Babies can cry in the womb.
The baby’s first cry is not post-birth, rather studies now show that they can express displeasure inside the womb. This can happen as early as 28 weeks gestation.
Researchers played low-decibel sounds on the mother’s belly and could see that the baby opened their mouth and exhibited crying-like behavior. But it’s a silent cry. Researchers also added that this in-vitro crying was nothing the mother should worry about.
11. Pregnancies leave women vulnerable to tooth decay.
Pregnant women are at risk for tooth decay and there are many reasons why. The changes in diet due to cravings may give some women a sweet tooth and the hormones that cause nausea, meaning more acidity on your mouth, to mention a few. This leads to gum disease and decay.
A simple way to prevent it all is by making oral health a priority, especially when you are pregnant.
12. The earliest milk bottle use came to be 7,000 years ago.
As it turns out, the breast/bottle debate is prehistoric. And mamas back then were pretty innovative too. Researchers have found little clay vessels, some shaped into mythical animals with hands and feet, with milk residue in them.
The earliest of them date back to 7,000 years ago and have been identified as prehistoric feeding bottles for babies. The dairy residue has been identified as breastmilk and milk from a cow, sheep, or goat.
13. The Ice Age made human breast milk more nutritious.
Human beings need sunlight to survive because our bodies only synthesize vitamin D in the sun. Allegedly, the last Ice Age should have wiped us out because newborns were not getting any vitamin D, considering the intense cold and lack of sunshine.
Scientists believe that a genetic tweak happened and mothers could transmit vitamin D and essential fatty acids to their newborn babies, and this may have ensured human survival.
14. Pregnancies can be contagious.
A study of more than 30,000 women conducted in Germany has indicated that pregnancy is contagious. It spreads from woman to woman in workplaces, in an endearing way. The results stated that “in the year after a colleague gives birth, transition rates to first pregnancies double.”
So if you are in the workplace and someone is pregnant, expect more pregnancies to pop up.
15. Most mammal moms carry their babies on the left.
Human mothers and even some mammal mamas cradle their babies on the left side of their bodies, closer to their heart. This is irrespective of a left-handed or right-handed mom. Science says that all the sensory information that comes from the left side of the body is processed on the right side of the brain.
The right side is where all the emotions are. And surprisingly enough, babies prefer to keep their moms on their left side as well, so it works for both mom and babe.
Bonus: Celebrity moms speak about motherhood.
Rosie Huntington-Whiteley
“I did start to feel this new sense of life. And now my confidence is so much greater.”
Lauren Burnham Luyendyk
“Breastfeeding is one of the hardest things I’ve ever done. I’m in awe of the ladies that make it look so effortless, and even the ones who don’t, you are superheroes.”
Do you have any other experiences as a child or a mother that show us that moms are actual superhumans? Share your motherhood stories with us and spread the joy.
Please note: This article was updated in June 2022 to correct source material and factual inaccuracies.
Preview photo credit laurenluyendyk / Instagram
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