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.
100-year-old woman finds ‘perfect match’ in 11-year-old senior chihuahua
Life has a beautiful way of surprising us, and sometimes, those surprises come in the form of a furry, four-legged companion. Meet Johanna Carrington, a remarkable centenarian who, despite a life filled with challenges, has always carried a deep love for dogs.
Johanna’s journey began in war-torn Germany, where owning a dog was a distant dream. She and her late husband once shared their home with eight Pekingese dogs, a testament to their shared love for these loyal creatures. However, when her beloved dog Rocky passed away, Johanna was left feeling alone in her house, yearning for a furry friend.
One might think that, at the age of 100, adopting another dog could be a challenge. Johanna was uncertain if the shelter would allow someone of her age to adopt. Fortunately, a caring neighbor who supports Muttville Senior Dog Rescue in San Francisco suggested that this organization might have the perfect solution.
Muttville Senior Dog Rescue recognized that Johanna Carrington and a senior dog would be an ideal match. After careful consideration, Johanna adopted Gnocchi, a charming 11-year-old Chihuahua, whom she lovingly renamed Gucci.
Gucci’s life had a rocky start; he was rescued from a hoarding situation where his previous owner had 22 dogs. Being the only pampered pooch in his new home brought him immense joy. Johanna’s caregiver, Eddie Martinez, and her daughter, Debbie Carrington, made a heartfelt commitment to ensure that Gucci’s golden years would be filled with love and care.
The moment Gucci entered his new home, he seemed to recognize that he belonged there. Johanna recalled the heartwarming first encounter, saying, “He approached the home as though he’d been here before. It was incredible. When he spotted me seated in my chair, he leapt up and perched on my lap. He made himself extremely at ease. Right away, he was just our kid.”
Now, Gucci enjoys a life fit for a pampered pup. He has “oodles and oodles” of toys to play fetch with, daily back massages while watching TV with his new mom, and even the privilege of burrowing under the covers in bed for extra comfort.
Debbie Carrington, Johanna’s daughter, shared how Gucci’s arrival transformed their home, saying, “It was sort of sad here after she lost her other dog. It was silent and melancholy until Gucci came in and brought excitement into the house. Laughing at him running around and doing silly things, and then him resting on her lap with her when she’s in her chair or bed, it’s just making her very happy.”
The heartwarming bond between Johanna and Gucci is a testament to the joy and companionship that animals bring into our lives, regardless of age. In fact, scientific research supports the positive impact of pet ownership on emotional and social well-being, particularly in older individuals.
As Johanna approaches her 101st birthday in December, she and Gucci plan to celebrate this special milestone together. For Johanna, dogs have played a significant role in her long and healthy life, proving that the love between a human and their furry friend knows no age limits.
In a world that often seems fast-paced and hectic, the story of Johanna and Gucci reminds us of the simple yet profound happiness that animals can bring into our homes and hearts.
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