Fig. 2

Image of the abomasal ulcer. Image of the mucosal surface of a part of the abomasum from a cow with type-3 abomasal ulcer. A perforated ulcer is visible at the centre and fibrin deposits containing pieces of green ingesta are seen to the right of the perforation. 1 Abomasal perforation, 2 abomasal mucosa with multifocal areas of hyperaemia, 3 fibrin with ingesta, 4 type-1 ulcer