Help Support EcoWatch
The best of EcoWatch, right in your inbox. Sign up for our email newsletter!
By Alexander Freund
In a pilot study at the University of Helsinki, dogs trained as medical diagnostic assistants were taught to recognize the previously unknown odor signature of the COVID-19 disease caused by the novel coronavirus. And they learned with astonishing success: After only a few weeks, the first dogs were able to accurately distinguish urine samples from COVID-19 patients from urine samples of healthy individuals.
"We have solid experience in training disease-related scent detection dogs. It was fantastic to see how fast the dogs took to the new smell," says DogRisk group leader Anna Hielm-Björkman. After only a short time, the animals identified the urine of people infected by the novel coronavirus, known as SARS-CoV-2, almost as reliably as a standard PCR test.
The Finnish scientists are now preparing a randomized, double-blind study in which the dogs will sniff a larger number of patient samples. Only then will the scent tests be used in clinical practice.
Important Findings for Other Teams
The very rapid and promising findings from Finland are also important for other research teams, such as those in Great Britain and France, who are training sniffer dogs to detect COVID-19.
Fellow researchers from the German Assistance Dog Center (TARSQ) have also benefited from the Finnish results.
"No one could tell us with certainty whether training with the aggressive virus is dangerous or not for humans and dogs. We wanted to gather more information first before we started training because the German virologists advised us against it — after all, so little is known about the virus so far," explains Luca Barrett from TARSQ.
Where Does the Characteristic Smell Come From?
It is still unclear which substances in urine produce the apparently characteristic COVID-19 odor. Since SARS-CoV-2 not only attacks the lungs, but also causes damage to blood vessels, kidneys and other organs, it is assumed that the patients' urine odor also changes. This is something which the dogs, with their highly sensitive olfactory organs, notice immediately.
Certain diseases appear to have a specific olfactory signature that trained dogs can sniff out with amazing accuracy, Barrett says.
"According to one study, dogs can detect breast cancer with a 93% probability, for example. And lung cancer with a 97% probability," she says.
But dogs can also identify skin cancer, colon cancer, ovarian cancer or prostate cancer very reliably, according to Barrett. "The hit rate, which was not so good in the early days of training, has risen enormously in recent years," she says.
Hit Rate Decisive
Besides cancer, the dogs can also detect Parkinson's disease. Parkinson's sufferers smell different even years before they have the disease. "That's how we came up with the idea of training dogs as an early warning system for Parkinson's," Barrett says.
Dogs are also trained to detect malaria, but the hit rate is not yet satisfactory, she says. So far, the dogs recognize seven out of 10 infected persons, which is not enough.
A high hit rate is, of course, also absolutely necessary when training for the aggressive SARS-CoV-2 pathogen, according to Barret. "We hope that the hit rate for the coronavirus is significantly higher in the fully trained dogs; after all, it would be very dangerous if COVID-19 were not detected," she says
Trained Tracking Dogs
Dogs' ability to smell is about a million times better than that of humans. Humans have about 5 million olfactory cells, compared with 125 million for dachshunds and 220 million for sheepdogs.
Dogs also inhale up to 300 times per minute in short breaths, meaning that their olfactory cells are constantly supplied with new odor particles. In addition, dogs' noses differentiate between right and left. This spatial sense of smell allows the animals to follow a trail more easily.
During the training sessions, the dogs — mostly Labrador retrievers or retrievers in general, but also cocker spaniels or sheepdog breeds — are each trained for one scent. That can be the smell of a drug or an explosive, or, as here, the olfactory signature of a specific disease.This means that one dog cannot recognize several types of cancer.
The animals are trained with containers holding samples of breath or sweat, for example. As soon as they have identified the smell they are looking for, the dogs hear a click and get a treat. They are reliably trained for the one smell on this reward principle.
Great Potential, Great Skepticism
Drug and explosive detection dogs have been used for some time. But trained medical scent detection dogs are also now working in hospitals. For example, they sniff the bodies of patients with suspected skin cancer to try and detect the disease — only with the patients' consent, of course. So these skilled snufflers are helping doctors in diagnosing diseases and detecting them early on.
However, so far there are only very few medical detection dogs. The dog owners almost always work voluntarily and the trained sniffer dogs live in normal households. There is great skepticism, especially among traditional doctors and health insurance companies, even though the first indications given by the dog have to be followed by further medical tests anyway and a lot of time and costs could be saved by early cancer detection.
Possible Coronavirus Applications
If the findings from Finland are confirmed, the sniffer dogs with their extremely sensitive sense of smell could prove to be a great help in the fight against the new coronavirus.
Luca Barrett from TARSQ can easily picture coronavirus sniffer dogs being used in situations where there is a high risk of infection. For example, people attending football matches and other major events could be checked before they are admitted.
The dogs could also be employed at airports to scan people entering a country. "When the dogs go down the queue, they can detect if someone is healthy and can enter the country. But if a person smells of COVID-19, the handler could send that person to a coronavirus testing center instead," Barrett says. That is because a second test is still needed to confirm the dog's initial sniff detection.
Barrett says dogs could also be used to search for the virus on surfaces. For example, before passengers board an aircraft, a four-legged friend could first check whether the machine is free from SARS-CoV-2. Similar measures are planned for doctors' surgeries, aged care homes or nursing homes that have had to be evacuated because of COVID-19 cases. Before these are used again, a sniffer dog could check whether the environment is "clean."
Reposted with permission from Deutsche Welle.
- Labradors Trained to Detect Illegally Trafficked Wildlife Products ... ›
- First Human Trial of COVID-19 Drug Set to Begin - EcoWatch ›
EcoWatch Daily Newsletter
Coronavirus Shines Light on Zoos as Danger Zones for Deadly Disease Transmission Between Humans and Animals
By Marilyn Kroplick
The term "zoonotic disease" wasn't a hot topic of conversation before the novel coronavirus started spreading across the globe and upending lives. Now, people are discovering how devastating viruses that transfer from animals to humans can be. But the threat can go both ways — animals can also get sick from humans. There is no better time to reconsider the repercussions of keeping animals captive at zoos, for the sake of everyone's health.
- Can Your Pets Get and Transmit Coronavirus? - EcoWatch ›
- Jane Goodall: COVID-19 Is Result of Our Unhealthy Relationship ... ›
- North Carolina Pug Tests Positive for Coronavirus, Could Be First ... ›
<div id="14b13" class="rm-shortcode" data-rm-shortcode-id="3dabcc399c214226e768937f555a5ebc"><blockquote class="twitter-tweet twitter-custom-tweet" data-twitter-tweet-id="1289943962405318657" data-partner="rebelmouse"><div style="margin:1em 0">Tropical Storm #Isaias no longer expected to restrengthen into a hurricane. 🌀 The vertical wind shear shredder has… https://t.co/kqBsJOS3Tj</div> — Ryan Maue (@Ryan Maue)<a href="https://twitter.com/RyanMaue/statuses/1289943962405318657">1596381581.0</a></blockquote></div>
<div id="dea35" class="rm-shortcode" data-rm-shortcode-id="132c2812ba753aaaf415ad33fb7ff2c0"><blockquote class="twitter-tweet twitter-custom-tweet" data-twitter-tweet-id="1290213982947737600" data-partner="rebelmouse"><div style="margin:1em 0">Here are the 5 am EDT Monday, August 3 Key Messages for Tropical Storm #Isaias. For the full advisory on #Isaias, v… https://t.co/5MbSBJmEhI</div> — National Hurricane Center (@National Hurricane Center)<a href="https://twitter.com/NHC_Atlantic/statuses/1290213982947737600">1596445959.0</a></blockquote></div>
<div id="80487" class="rm-shortcode" data-rm-shortcode-id="dcd38a3bef604d3ff7ef47552482cbe4"><blockquote class="twitter-tweet twitter-custom-tweet" data-twitter-tweet-id="1290216672976986113" data-partner="rebelmouse"><div style="margin:1em 0">There is a moderate risk of flash flooding across portions of the eastern Carolinas and Mid-Atlantic states from… https://t.co/C5Ys46ZetX</div> — National Hurricane Center (@National Hurricane Center)<a href="https://twitter.com/NHC_Atlantic/statuses/1290216672976986113">1596446600.0</a></blockquote></div>
- Atlantic Faces Fifth 'Above-Normal' Hurricane Season in a Row ... ›
- Isaias Menaces Bahamas and Florida as 2020 Season's Second ... ›
- Mass-Market Electric Pickup Trucks and SUVs Are on the Way ... ›
- SUVs and Trucks Nullify Car Efficiency Gains - EcoWatch ›
By Kate Whiting
Bernice Dapaah calls bamboo "a miracle plant," because it grows so fast and absorbs carbon. But it can also work wonders for children's education and women's employment – as she's discovered.
These are the world's most bicycle-friendly cities. Statista<p>"The reason we use bamboo to manufacture bicycles is because it's found abundantly in Ghana and this is not a material we're going to import," says Dapaah, one of the World Economic Forum's Young Global Leaders.</p><p>"It's a new innovation. There were no existing bamboo bike builders in our country, so we were the first people trying to see how best we could utilize the abundant bamboo in Ghana."</p>
<span style="display:block;position:relative;padding-top:56.25%;" class="rm-shortcode" data-rm-shortcode-id="a335b5dffdd806bd6bb4debea90c2045"><iframe lazy-loadable="true" src="https://www.youtube.com/embed/dxsb9c4HMn0?rel=0" width="100%" height="auto" frameborder="0" scrolling="no" style="position:absolute;top:0;left:0;width:100%;height:100%;"></iframe></span>
Supporting Students<p>Besides encouraging Ghanaians to swap vehicles for affordable bikes, Ghana Bamboo Bikes Initiative is helping students save time on walking to school so they have more time to learn.</p><p>Each time they sell a bike, they donate a bike to a schoolchild in a rural community, who might otherwise have to walk for hours to get to school.</p><p>Dapaah knows how transformative a shorter journey to school can be to academic performance. She grew up living with her <a href="https://www.youtube.com/watch?v=sb3joGYmx9A&feature=emb_logo" target="_blank">grandpa, a forester in a rural part of the country</a>.</p><p>"We had to walk three and a half hours every day before I could go to school. He later bought me a bike, so I finished senior high and wanted to go to university."</p><p>The experience inspired her to launch Ghana Bamboo Bikes Initiative with two other students at college.</p><p>"When we started this initiative, I looked back and said, when I was young, I had to walk miles before I could get to school, and sometimes if I was late, I was punished.</p><p>"Why don't we donate bikes for students to encourage them to study and so they can have enough time to be on books."</p><p>To date, they have sold more than 3,000 road, mountain and children's bikes – and Dapaah says they plan to donate <a href="https://www.entrepreneur.com/video/350343" target="_blank">10,000 bikes to schoolchildren over five years</a>.</p>
Empowering Women<p>The enterprise is also providing local jobs. It teaches young people to build bikes, particularly women and those in rural communities, where jobs can be scarce. More than 50% of people they have trained are women.</p><p>Dapaah says they want to boost the number of people they employ to 250 over the next five years and they are looking to partner with NGOs to build a childcare facility so mothers can continue to work.</p>
Reducing Emissions<p>By promoting a cycling culture in Ghana, Dapaah says they're also committed to reducing emissions in the transport sector and contributing to the UN's Sustainable Development Goals.</p><p>"I love the idea of reusing bamboo to promote sustainable cycling. People want to go green, low-carbon, lean-energy efficient," she says.</p>
- 7 Non-Toxic Yoga Mats - EcoWatch ›
- Floating Bicyclist Sweeps Plastic From London Waterways - EcoWatch ›
Deforestation coupled with the rampant destruction of natural resources will soon have devastating effects on the future of society as we know it, according to two theoretical physicists who study complex systems and have concluded that greed has put us on a path to irreversible collapse within the next two to four decades, as VICE reported.
- Human Activity Is Making Forests Shorter and Younger, Study Finds ... ›
- Fighting Poverty Can Also Fight Deforestation, New Study Finds ... ›
- Coronavirus Pandemic Linked to Destruction of Wildlife and World's ... ›
- To Stop Amazon Deforestation, Brazilian Groups Take Bolsonaro to ... ›