Morphologic Diagnosis Wattle: Moderate diffuse edema with locally extensive hemorrhage Clinical Description This image was taken 2 days post experimental inoculation with highly pathogenic avian influenza. In this detailed view of the wattles, large ecchymotic hemorrhages are visible. Pathologic Description The subcutaneous tissues of the wattle is swollen and the entire region is reddened with a locally extensive area being discolored dark red to purple.