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.
Chinese authorities crack down on stray dogs after a Rottweiler mauls a toddler
A shocking video of a Rottweiler mauling a two-year-old girl in China has prompted a crackdown by local authorities on stray dogs that some argue has now gone too far.
Authorities were initially praised for their swift response to the incident, but netizens soon began sharing accounts of stray canines in their neighborhood being roughly rounded up and, in some cases, put down.
The new directive to clamp down on large, unleashed dogs is being cited as the latest example of a knee-jerk reaction by Chinese authorities that also highlights the country’s long-standing struggle with animal rights and welfare.
“Just because a large dog bit a child, all of them are being hunted down by ruthless security guards and police,” one user wrote on Chinese social media Weibo under the hashtag “Will the biting of the girl bring stigma to a large dog?” viewed by almost 1 million users.
“Such a one-size-fits-all approach makes me really sad,” she said.
Video of the October 16 attack shows the girl stepping out of a residential compound with her mother in Chongzhou, in China’s southwestern province of Sichuan, and immediately being chased and bitten by a large black Rottweiler.
The mother tries to shield her daughter from the dog, but then tries to pull her back as the animal drags the child around.
A cleaner who comes to help with a broom also fails to drive the dog away.
A man finally succeeds in chasing the Rottweiler away with a wooden stick.
By that time, the mother is sitting on the ground, crying, with her daughter in her arms.
Calls to add Rottweilers to list of banned dogs after string of attacks
The toddler was admitted to hospital, where she was treated for a ruptured kidney, fractured ribs and bite marks on various parts of her body, several Chinese state media outlets reported.
Authorities caught the Rottweiler and detained its owner, according to state media.
Since then, local authorities in a raft of provinces including Shandong, Jiangxi, Yunnan, Hunan, Anhui have stepped up law enforcement, some more heavy-handed than others.
Stray dogs are the main targets, but pets who are unleashed can also be subject to control measures.
Most local police said they would ramp up patrols to round up stray dogs and fine owners who fail to put their dogs on a leash.
More robust approaches include police in Yanzhou in Shandong vowing to hunt down “mad dogs” and euthanize them.
The country is home to 40 million stray dogs, according to the 2021 China Pet Industry white paper.
In the past, strays have been blamed for rabies outbreaks and authorities have attempted to control their numbers with culls.
In one case that triggered an outpouring of grief online, a small stray dog – known as Xiao Huang, or little yellow – was taken away in a net by security personnel at a university campus in Chongqing and beaten to death, according to state-affiliated media.
Many netizens were perplexed by the decision to kill a tiny dog, whose image is being shared on Weibo with the hashtag “straydogxiaohuang,” with a call for greater rights for stray dogs.
The university said the canine had entered the student dormitory, posing a threat to the safety, according to state-affiliated news outlet Beijing Time.
In Shanghai, images of police officers descending on a local neighborhood and dragging away a German Shepherd also sparked fury online.
Many netizens believe the dog was old and did not pose a danger to the community.
But Shanghai authorities said they were acting on complaints from neighbors about an aggressive dog and that it was “taken in and dealt with,” according to a post on their WeChat account.
This is not the first time Chinese authorities have been accused of being heavy-handed with animals.
During Covid, some pet owners complained that their dogs were beaten to death when they were taken away for quarantine, anecdotes that sparked uproar across the internet.
A number of netizens praised the authorities for taking proactive steps, but most warned against the consequences of going overboard.
Celebrities also joined the chorus of animal lovers to call for better understanding.
Chinese actress and singer Cya Liu, who won Best Actress at the Hong Kong Film Awards last year, called for an end to the killing.
“Not all stray dogs are bad just as not all men are good,” she wrote on Weibo, with the hashtag “voicing out for stray dogs.”
Bo Ai Animal Protection Centre Of Guangyuan in Sichuan wrote on Tumblr-like Chinese social media Meipian that China should be using its development to instill a better sense of social responsibility and a respect for animals in people.
“Beating and catching dogs at every turn. Let the world see what our great motherland is like,” it said.
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