In Brittany, seropositivity for SARS-CoV-2 was detected in five wild mustelids out of 32 animals tested.
In the French region of Brittany, mainly in the department of the Côtes d’Armor, during the first semester of 2021, seropositivity for SARS-CoV-2 was detected in five wild mustelids out of 32 animals tested. Anti-SARS-CoV-2 IgG against at least four out of five recombinant viral proteins (S1 receptor binding domain, nucleocapsid, S1 subunit, S2 subunit and spike) were detected using automated western blot technique in three martens (Martes martes) and two badgers (Meles meles)
All the mustelids studied lived in anthropized and non-isolated rural areas. From one or more index cases, transmission spread directly between mustelids. This is certain for the badgers from Perret, Côte d’Armor.