For centuries, dogs’ keen senses have helped people to hunt, herd, find missing people (dead or alive), and sniff out certain diseases, as well as detect drugs, firearms, and explosives at airports, stadiums, or other crowded places. Dogs lead the blind and can help protect and warn people with seizures. And now dogs are being employed to detect covid-19. As soon as the pandemic hit, dog trainers around the world began looking at how man’s best friend could help. In November last year, canine researchers and organizations came together via an online conference called the International K9 Team. They shared preliminary results and planned future research activities. All agreed that dogs could be trained to detect covid, though it is unknown exactly what chemical compounds the dogs respond to.
The dogs’ accuracy reportedly ranged from 80-100%. In various studies, the dogs were trained for four to six weeks with a variety of scent samples. The canines could correctly detect the covid scent in both sweat and urine samples from infected people and distinguish the infected from the uninfected samples. Some dogs were better than others in picking up the scent. Studies have included a variety of breeds including Labradors, Golden Retrievers, and Cocker Spaniels.
The numerous formal studies, both in the U.S. and internationally, have yet to be peer-reviewed or formally published. Scientists have warned about the dangers of coming out too early and making grand claims from small data sets. Nevertheless, initial results are promising. Several canine programs have already been set up including at airports in the United Arab Emirates, Finland, and Lebanon. In both Finland and Lebanon, the dogs were even able to detect covid in passengers several days before the traditional tests picked it up, indicating that dogs might be good at early detection.
Here in the U.S., research is ongoing at several veterinarian schools including the Penn Vet Working Dog Center at the University of Pennsylvania in Philadelphia. In January in Miami, covid-sniffing dogs were used at the American Airlines Arena to
screen basketball fans
coming to see the Miami Heat play. If a dog sat down next to a person, indicating that a covid scent was present, that person and accompanying party were turned away — but with a full ticket refund!
Several issues remain to be resolved. While numbers appear to be low, some dogs have contracted covid. Cats appear to be more vulnerable to the virus, though again there are no firm numbers. Currently there are no covid vaccines for pets or livestock, though in principle, the human vaccines should be adaptable for use in various other species. Mink, lions, and other animals have been diagnosed with the disease although humans seem to be most susceptible to it. While more research and trials are needed, it seems clear that dogs will soon be lending a helping paw in the ongoing battle against covid-19.
But it’s not just dogs. Dutch researchers have announced that they have trained bees to stick out their tongues whenever they smell the covid virus. The bees, the scientists say, are 95% accurate in detecting the covid virus. The researchers use little harnesses to hold the bees in place while the various “scent samples” are presented. The organizers of the study envision bees providing an easy, portable, and affordable “rapid screening” technique that could be deployed in areas without good access to the usual sophisticated but expensive lab equipment and personnel — think applications in third-world and developing countries as well as the isolated rural areas in any country. The study results aren’t yet peer-reviewed and published in scientific journals. But bee alert for updates!
Meanwhile on the Eastern Shore, there is steady progress in the fight against covid-19. Numbers, including new cases and hospitalizations, have been declining in every county except one, Worcester, which experienced a jump in new cases over the past week. After a supply shortage earlier in the year, vaccines — both the one- and two-shot varieties — are now readily available through local pharmacies and county health departments. Children aged 12 and up are now eligible for vaccines, which is a relief to many parents, as the current variations of the virus are landing a higher percentage of children in the hospital, with many of those hospitalized children needing ventilators.
The risk of contracting a severe case of covid is considered minimal for those who are fully vaccinated. However, risk is still high for the unvaccinated, especially in areas currently experiencing community transmission. Of the nine Eastern Shore counties, six are considered areas of high risk for the unvaccinated. Four of these high risk areas — Worcester, Dorchester, Somerset, and Wicomico — are on the lower shore, while the other two high risk counties further north are Queen Anne’s and Cecil. The remaining three counties — Caroline, Kent, and Talbot, all with lower positivity and new case rates — are considered moderate risk areas for the unvaccinated.
Remember, folks, while things are getting better, covid is still out there. Get vaccinated and stay safe.
This table is sorted by places with the most cases per 100,000 residents in the last seven days. From New York Times, Sat., June 5, 2021.
Sources and more information:
ABC News; “Dogs May Be Able To Sniff Out Covid-19 Infections, Early Research Suggests”
https://abc7.com/can-dogs-smell-covid-sniffing-pets-research/10693414/
Nature; “Can Dogs Smell Covid? Here’s What The Science Says”
https://www.nature.com/articles/d41586-020-03149-9
Maryland State Department of Health; “Maryland Covid Data Dashboard” updated daily. [This article’s data from June 5, 2021]
https://coronavirus.maryland.gov/
New York Times; “Tracking Coronavirus in Maryland: Latest Map and Case Count” updated daily. [This article’s data from June 5, 2021]
https://www.nytimes.com/interactive/2021/us/maryland-covid-cases.html
Washington Post; “Scientists May Have Found A New Coronavirus Rapid-Testing Method: Bees;” May 7, 2021
https://www.washingtonpost.com/science/2021/05/07/covid-bee-testing/
ABC News; “Coronavirus-Sniffing Dogs To Be Used To Screen Attendees At Miami Heat Games” January 25, 2021
https://abc7.com/covid-sniffing-dogs-miami-heat-coronavirus/10003702/
Jane Jewell is a writer, editor, photographer, and teacher. She has worked in news, publishing, and as the director of a national writer's group. She lives in Chestertown with her husband Peter Heck, a ginger cat named Riley, and a lot of books.