Fig. 4
From: Dirofilaria immitis in pinnipeds and a new host record
Histopathology of the lungs of a South African fur seal, stained with haematoxylin and eosin. a Severe pulmonary haemorrhages, note the presence of blood in the lumen of the alveoli. b Extensive pulmonary emphysema. c Catarrhal bronchitis, note the lumen of a bronchus obstructed with mucus (arrows)