Equid, Horse: Cranial mesenteric artery. Strongylus vulgaris larva in thrombus viewed under the dissecting microscope.

Equid, Horse: Stomach. Gasterophilus species, bots.

Equid, Horse: Esophagus. Ulcerative esophagitis.

Equid, Horse: Esophagus. Esophageal ulceration.

Equid, Horse: Ileum. Hemomelasma ilei.