Their highly superior sense of smell has long been used to sniff out drugs, weapons and dead bodies. Now Latin America’s crime-fighting police dogs are being trained to detect COVID-19.
In El Salvador, police are using artificial aromas similar to the sweat of a person infected with COVID-19 to train dogs.
“It’s not so easy, because the COVID-19 strains seem to be changing a lot,” said Wilber Alarcon, a canine handler from the nation’s anti-narcotics police.
Photo: AFP
“But the ones that are known have been synthesized and pseudo-aromas have been extracted to train the dogs,” said Alarcon, who was in Mexico for a regional canine training exercise.
Alarcon said he expects COVID-19 sniffer dogs to soon be patrolling airports, bus terminals and border posts in his country, one of seven to attend the drills in Mexico’s eastern state of Veracruz.
“The dog detects and marks the infected person, a strict biosafety protocol is activated, and you are reducing the risk that a person, or others close to the infected person, may catch the virus,” he said.
Dogs are believed to have up to 300 million olfactory receptors — far more than humans — that give them their superior sense of smell.
Studies have suggested that they can detect the virus even in asymptomatic patients.
It is not the first time that dogs have been trained with artificial scents — they are also used to teach them to sniff out drugs or explosives.
In Mexico, where 80,000 people officially went missing from 2006 to last year, the aromas include “putrefied, fresh or drowned corpse.”
In Mexico’s northwestern state of Sonora, state and private organizations already have six dogs in operation and are training about 30 to detect COVID-19, said Juan Mancillas, head of “Canines Against COVID.”
They include breeds such as Golden Retrievers, Labradors, German Shepherds and Belgian Shepherds.
Similar programs are being carried out elsewhere in the region in response to a pandemic that has left more than 700,000 people dead across Latin America and the Caribbean.
In Chile, a squad from the Police Canine Training School has been deployed in the capital Santiago and there are plans to extend the initiative to other parts of the country.
In Europe, Czech trainers have reported a 95 percent success rate in COVID-19 detection in samples of human scent by dogs — seen as a fast, effective and pain-free method.
In Britain, the charity Medical Detection Dogs is also hoping to harness the power of canine noses that it says can smell other human illnesses such as cancer, Parkinson’s disease and malaria.
In Miami, dogs have been deployed to sniff out COVID-19 infections among fans going to watch basketball.
Their new role in the pandemic is no surprise to handlers of the Veracruz state government’s K9 Company of sniffer dogs, worth an estimated US$24,000 each.
So powerful is their sense of smell that in 2016 they located a body buried 3m underground — a national record.
Several years later they detected a shipment of marijuana covered with thick layers of motor grease and coffee.
“They’re infallible animals. They’re never wrong. Humans are wrong,” said K9 Company trainer Daniel Valentin Ortega.
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