“…These present histopathological findings are consistent with several previous pathological data reported with HPAI in the literature [ 42 , 44 , 48 , 51 , 52 , 53 ]. In these previous studies [ 42 , 44 , 48 , 51 , 52 , 53 ], trachea and lungs showed congestion, edema, thrombosis, diffuse hemorrhages, necrosis, and sloughing of the epithelial lining of trachea and bronchi, extensive alveolar damage, together with inflammatory cells infiltration including macrophages, lymphocytes, and heterophils. In addition, depletion of the lymphoid follicles and heterophilic cells infiltration was observed in the spleen, together with hemorrhagic foci and necrosis of the periellipsoid lymphocyte sheaths, which is consistent with several previous studies [ 43 , 48 , 51 ].…”