Brazil is investigating another four new potential cases of highly pathogenic avian influenza (H5N1) in wild birds, according to authorities from the state of Espirito Santo, where Brazil's first ever cases were confirmed this week.
After the birds showed symptoms consistent with H5N1, samples were taken from the four, all of them from the Thalasseus acuflavidus species (Cabot's terns), according to a statement from Espirito Santo's Agriculture, Supply, Aquaculture and Fisheries agency on Friday.
