As the availability of COVID-19 tests dwindle across Canada, another option to detect the virus in the form of a furry friend may be the next best thing.
Multiple studies show that dogs can be more effective, faster and potentially less expensive than the current tests on the market.
The research has grown since 2020, with University of California Santa Barbara professor Tommy Dickey finding the collective research shows trained scent dogs are “as effective and often more effective” than both the rapid antigen tests many people keep in their homes, and even the PCR tests deployed at clinics and hospitals.
But even with studies showing their effectiveness, COVID-19-detecting dogs are deployed only in certain jurisdictions in various countries.
One such place is the Canines for Care program at Vancouver Coastal Health (VCH), which started looking into the possibility of training dogs to detect COVID-19 in early 2021.
Dr. Marthe Charles, division head of medical microbiology and infection prevention and control at VCH, said the idea stemmed from the early reliance on laboratory testing.
“I think there was a will from public health at the time and also from the various levels of government to try to find a way that was fast, accurate and non-invasive to be able to detect and train as many people as possible,” Charles told Global News in an interview.
Three dogs — two Labrador retrievers and an English springer spaniel — were brought in for training. The dogs were exposed to items such as masks that were worn by patients either negative or positive for the virus. This trained the dogs to recognize what is and is not COVID-19.
Charles said the dogs were trained since being puppies to associate the scent of COVID-19 with food and were rewarded each time they correctly detected a positive case of the virus.
“So from early on in their lives, they’ve associated the scent of a case of COVID to a rewarding scent,” she explained.
This reward method is not just used by VCM. It was also used with a group of dogs sourced in early 2021 for a French study, trained at detection using toys — usually tennis balls — as rewards.
Dr. Carla Simon, owner of Hunter’s Heart Scent Detection Canines in Calgary, said this method of training dogs is common. By using rewards, it can help motivate them to find the scent.
“We would pair, let’s say, the sweat samples with COVID, with their reward, and they notice that every time they find their reward, there’s that special smell,” she explained. “We just have to make it rewarding for the dog.”
She added, however, that the dog chooses the reward so trainers can ensure the canines “show up every day and want to do their job.”
Earlier this month, Dickey along with Heather Junqueira of BioScent, Inc. gathered several peer-reviewed studies into a review that was published in the Journal of Osteopathic Medicine. Dickey said the number of peer-reviewed studies over the past few years went from four to 29, incorporating the work of more than 400 scientists from more than 30 countries and 31,000 samples.
The review noted the effectiveness of dogs’ ability to detect COVID-19 comes down to their noses.
“The nose is not like humans,” Simon said. “It’s massively different, orders of magnitude different, and they can detect things without us being able to smell them.”
Humans have about five to six million olfactory receptors in their noses, while dogs have hundreds of millions. One-third of their brain is devoted to the interpretation of smell — something only five per cent of a human’s brain is committed to, according to Dickey’s review.
The study found dogs’ noses may even be able to detect pre-symptomatic COVID-19 cases, or even those who will develop symptoms later.
Dickey told us in an interview that this could help limit or stop the virus from spreading.
“The longer the wait is between your test and your result, that’s a latent period,” he said. “During that time you’re running around spreading COVID and you don’t know it. The dogs with a direct sniff will be done in seconds.”
Many of the studies conducted, including the work at VCH through the Canine for Care program, have shown dogs’ ability to detect the disease correctly with a success rate of more than 90 per cent. Additionally, the studies also showed a high speed at which the dogs could identify cases. In one study in Thailand, researchers reported the dogs had gone through thousands of samples in just a few weeks.
“The dogs take only one to two seconds to detect the virus per sample. Once they detect a patient, they will sit down,” said Chulalongkorn University professor Kaywalee Chatdarong, who led the 2021 project. “This takes only one to two seconds. Within one minute, they can manage to go through 60 samples.”
Even though the research suggested deploying scent-detection dogs could also be less expensive than rapid or PCR tests, Charles cautioned the logistics that go into training the dog is where it becomes “more prohibitive.”
In VCH’s case, training of the dogs included the medical microbiology lab to provide samples for use, working with infection prevention teams and control nurses, and if a dog identifies an area of concern, cleaning services may need to be utilized. And when it comes to rolling out testing using the dogs, enough staffing is needed for mass screening.
Despite this, while Charles says deploying the dogs widely could be difficult due to staffing and training, they are still one of several tools that can be used in COVID-19 detection.
“I think the way to see those dogs from my perspective is really like another tool in the toolbox and trying to prevent further transmission of pathogen of concern,” she said.
Dickey and Junqueira say dogs should have a place in “serious diagnostic methodology” including in helping should the world face a future pandemic.
People wondered about the purpose of these 6 things and got unexpected answers
If you’re unsure, look it up on Google, or even better, ask around in the online community for the solution. These days, knowledge is at our fingertips because to the digital age we live in, which not only makes it possible for us to study a vast amount of fresh information but also connects us to other people who have interests in common.
Six individuals approached the Internet users and requested their assistance in identifying the objects they had discovered. They received their responses quickly, as was to be expected.
1. Is it trash or is there more to it?
While rummaging through the junk drawer, someone noticed something that caught his eye. This individual called the object a “scoopy doodad” and was curious to find out what it was or if it was just a piece of junk. He described it as being very heavy, unmarked, and having a very little hole on top.
The online community claims that the original Sunbeam Mixmaster included a juicer attachment, which included a bowl that attached to the mixer’s top and an odd-looking item that served as the spout through which the juice would flow. The purpose of the wire portion that is holding the little strainer is to remove the pulp.
A vintage cabinet discovered
Someone opened an old cabinet and discovered an odd device made entirely of glass with tiny holes running the length of it. They were curious to find out more, and fortunately, other users of the internet were there to inform them of their discovery.
This item turned out to be a flower frog that was used to support a vase of flowers. Have you ever witnessed anything like before?
3. A bulky glass item
Someone found a heavy glass object and asked Redditors to help him identify it. It was unmarked when it arrived, and the top had a very little hole. The people on this site knew the solution, as usual.
Perhaps you were surprised to learn that this thing was actually an oil candle.
4. An enigmatic item discovered in a bedroom drawer
A curious thing was found inside the bed drawer, leaving one Reddit member perplexed. Although the bottom seemed to be composed of soft leather or suede, they were unsure of its possible identity.
It was revealed by a user who was knowledgeable about the item’s nature that this is a nail buffer. It’s something I never would have anticipated.
5. What’s concealed beneath the flooring?
One Reddit member was having trouble identifying a silver-colored device that looked like an old-fashioned scissor. They claimed to have discovered the strange object beneath the floorboards of a house built in the 1800s.
Despite its peculiar appearance, it was discovered that this item, which was used to peel the tops off soft-boiled eggs, was widely utilized and a fixture in many homes in the past.
6. An odd discovery in a motel room
A visitor observed something in a hotel room that intrigued him enough to inquire about it with Reddit users. They couldn’t help but wonder why their bedside table had a vertical slot inside of it.
As usual, Redditors were quick to respond to this person, letting them know that a tablet or laptop may be stored in this position.
Were you aware of what these things were?
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