Fig. 1

Conjunctivitis caused by clade 2.3.4.4e H5N6 high pathogenicity avian influenza virus in a Northern pintail duck. Representative histopathological findings of conjunctivitis (A) and immunohistochemical demonstration of type A influenza virus antigens in the corneal epithelium (B), The specimen is from a Northern pintail (P121), collected at 3 days post-infection. Bars indicate 100 µm (A) and 50 µm (B)