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.
CHRONIC CONSTIPATION – A SILENT THREAT TO YOUR DIGESTIVE HEALTH
Constipation may seem like a minor inconvenience, but when left untreated for extended periods, it can lead to severe health consequences. Below is a real-life case that highlights just how dangerous chronic constipation can be and why you should never ignore it.
Shocking X-ray Image of a Patient with Long-Term Constipation
The X-ray image below belongs to a young woman who suffered from chronic constipation for years. One day, her condition worsened, and she went for over two weeks without a bowel movement. Concerned, she finally sought medical help, only to receive alarming results.
The Root Cause:
- When the digestive system is unable to expel waste properly, stool begins to accumulate in the colon, causing severe discomfort and pain.
- Over time, the colon stretches beyond its normal capacity to hold the excessive buildup of fecal matter.
- In the X-ray, you can see how the colon has expanded dramatically, reaching up towards the chest area, near the heart.
- The normal folds and wrinkles of the colon, which are essential for its function, have almost disappeared due to extreme bloating and distension.
This condition, often overlooked, can lead to life-threatening complications if not addressed in time.
The Dangerous Consequences of Chronic Constipation
Severe Colon Distension
- When the colon is forced to expand beyond its natural limit, it gradually loses its ability to contract and push stool forward.
- This results in worsening constipation, making it even harder for the body to have a natural bowel movement.
Video : Constipation: The Silent Danger Hiding in Your Gut and How to Avoid It
Toxin Build-Up in the Body
- When waste remains in the colon for too long, harmful toxins and bacteria can be reabsorbed into the bloodstream.
- This can cause chronic fatigue, acne breakouts, bad breath, bloating, and weakened immunity.
Hemorrhoids & Anal Fissures
- Excessive straining while attempting to pass hard stools can lead to hemorrhoids (swollen veins in the rectum), which cause pain and bleeding.
- Severe cases may result in anal fissures, tiny tears in the anus that make bowel movements extremely painful.
Intestinal Blockage (Bowel Obstruction)
- One of the most life-threatening complications of untreated constipation is bowel obstruction.
- When waste completely blocks the intestines, it can cut off blood supply to the gut, causing tissue death (necrosis) and serious infections.
- In extreme cases, patients may require emergency surgery to remove the damaged part of the intestine.
Increased Risk of Colon Cancer
- Studies have suggested that chronic constipation may be linked to a higher risk of colorectal cancer.
- The prolonged presence of waste in the colon increases exposure to carcinogenic (cancer-causing) substances, leading to inflammation and abnormal cell growth.
How to Prevent and Treat Constipation Naturally
The good news is that constipation is preventable with a few simple lifestyle adjustments. Here’s how you can keep your digestive system running smoothly:
Increase Fiber Intake
- Eat more fruits, vegetables, whole grains, nuts, and seeds.
- Foods like chia seeds, flaxseeds, apples, pears, and prunes are excellent natural laxatives.
Stay Hydrated
- Drink at least 2-3 liters (8-12 cups) of water per day to soften stools and promote bowel movements.
- Warm lemon water in the morning can help stimulate digestion and relieve constipation.
Exercise Regularly
- Movement helps stimulate the intestines and encourages regular bowel activity.
- Try walking, yoga, or stretching exercises for 15-30 minutes daily.
Develop a Consistent Bathroom Routine
- Train your body to go at a regular time each day, preferably after meals.
- Avoid holding in bowel movements, as this can make constipation worse over time.
Limit Processed & Low-Fiber Foods
- Cut back on fried foods, fast food, dairy, red meat, and refined carbohydrates (white bread, pastries, sugary snacks).
- These foods slow digestion and contribute to hard stools.
Try Natural Remedies
- Drinking warm herbal teas (such as ginger tea, peppermint tea, or fennel tea) can soothe digestion.
- Aloe vera juice and magnesium supplements are also helpful for easing constipation.
Video : Man’s Extreme Constipation Nearly Kills Him
🚨 Important Reminder:
If you haven’t had a bowel movement in 2-3 days, start paying close attention to your diet and lifestyle. If constipation persists for over a week, or you experience severe pain, bloating, vomiting, or blood in your stool, seek medical attention immediately.
Final Thoughts
Constipation isn’t just an uncomfortable nuisance—it can turn into a serious health problem if left untreated. Taking proactive steps to support your digestive system can prevent long-term complications and keep your gut healthy.
Your health starts with small daily habits—so don’t ignore what your body is telling you!
Leave a Reply