Figure 2.

Gross pathological findings. Gross pathological lesions observed from the birds submitted for necropsy and later confirmed for HPAIV H5N1 during winter/spring of 2021. Main gross pathological findings included cyanosis around the hocks and combs. Changes in the abdominal cavity were observed primarily in the liver, spleen and intestines with congestion and oedema being observed. Species examined included chicken (Gallus gallus domesticus), African fish eagle (Haliaeetus vocifer), and African mourning dove (Streptopelia semitorquata). The number of carcasses assessed for each species is indicated at the bottom of the chart. Numbers captured in the chart refer to the number of birds that presented with the lesion. The colour range in the key reflects the frequency of the pathological sign observed from least (light) to highest (dark) frequency.