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.
Heartbreaking Encounter: An Unconscious and Chained Dog’s Desperate Cry for Help on the Streets
Amidst a Tranquil Stroll: A Tale of Compassion and Rescue
One fateful Sunday evening, as I wandered through the familiar streets of São Paulo, an unexpected and heart-wrenching sight crossed my path. In the dimly lit corner of the street, I encountered a pitiful scene that shook me to my core: a defenseless dog, unconscious and chained.
Approaching cautiously, I could see the dog’s once lustrous fur now matted and soiled, a poignant testament to its prolonged suffering. The rusty chain, cruelly tight, had inflicted visible discomfort and injuries upon the poor creature’s neck.
The dog’s once-vibrant eyes, now dimmed by fear and pain, made feeble attempts to summon help with raspy, plaintive barks, yet it seemed invisible to the indifferent passersby. My heart ached witnessing this desperate cry for aid go unanswered.
Without hesitation, I knew I had to intervene. With trembling hands, I carefully examined the chain, realizing it had become embedded deep within the dog’s skin, causing severe wounds. Gently, I reached into my bag for a pair of scissors and painstakingly began to free the dog, mindful not to inflict further harm.
As the chain fell away, the dog slowly regained consciousness. Its trust in humanity had been shattered, but it tentatively accepted my reassuring touch. Tears welled in my eyes as I contemplated the cruelty it had endured.
The next steps were clear: I needed to seek immediate medical attention for this suffering soul. Cradling the dog gently in my arms, I embarked on a mission to find the nearest animal shelter or veterinary clinic capable of providing the care and rehabilitation it so urgently required.
This encounter served as a stark reminder of the paramount importance of compassion and empathy toward all living beings. It was a resounding call to action, a plea for change.
The surviving puppy found refuge with me, and I promptly alerted the relevant authorities to collect the deceased dog. According to the Samson Law, the owner of these animals will be held accountable for their actions.
Let us collectively work toward a world where such heart-wrenching encounters become rare, and compassion prevails.
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