Will dogs become formidable agents in the fight against Covid-19? Since Friday May 1, seven animals have been trained in Ajaccio, Corsica, to detect a possible odor of the virus, as part of a test conducted by veterinarians and firefighters.

Called Nosais, this research developed by Professor Dominique Grandjean of the National Veterinary School of Alfort, in the Paris region, plans to experiment with cynotechnical skills in order to identify specific odors that could be emitted by patients who are positive for the coronavirus.

"If we can validate this experiment, the goal is to provide a complementary solution to the tests that already exist" to detect the disease, explains to Aymeric Bernard, chief veterinarian and cynotechnical advisor of the Fire and Rescue Service of Corsica -du-Sud (SIS 2A), which takes part in the project.

"The hospital needs many and reliable means of screening. Today, the PCR test has a reliability of 70%. We therefore need to cross this test with other types of screening", indicates for his part the director of Ajaccio hospital, Jean-Luc Pesce, insisting on the interest of this experiment for his establishment.

Corsica was one of the regions most affected by the coronavirus epidemic. With the support of the prefecture of Corse-du-Sud, the Regional Health Agency of Corsica, and Ajaccian hospitals of La Misericorde and Eugenie, six shepherds from Mechelen and one bitch of the cursinu breed from the fire department of Corse-du-Sud are therefore tested on the site of a future veterinary clinic.

Tests from the sweat of positive test patients

Ajaccian hospitals will provide around 50 compresses placed for a few minutes in the armpits of patients who test positive for the virus. 

"The advantage is that at the sweat level, there is no viral expression today which has been noted and therefore a priori no risk of contamination, which means that the dog will be able to intervene in a secure manner ", specifies the SIS veterinarian.

Inserted in sterile jars, they will be placed in a small hatch, near the dog's favorite toy. Next to his master, the animal will then breathe this smell before retrieving his toy, and will therefore associate it with the game.

Then, the jar will be installed in one of the supports in the detection room. The goal for the dog will then be to "mark" by the sitting or lying position the support containing the positive compress, before being rewarded with his toy. A process that can be repeated fifty times a day for the next few weeks.

Dogs that detect other diseases

At the same time, the University of Corte, in Haute-Corse, associated with the project, will work on the scientific validation of the protocol to find out at the cynotechnical level if dogs can detect the smell of Covid-19.

The dog is already used for the detection of several chronic diseases, certain cancers, malaria, or even Parkinson's disease.

The first results of this Nosais trial will be known in mid-May. After Corsica, other territories should join the experience in the coming weeks, such as the fire and rescue service of Seine-et-Marne or the battalion of marine firefighters in Marseille.

With AFP

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