Suppurative metritis, uterus, baboon , case 42. The lumen of the uterus contains intense inflammatory infiltrates, hemorrhage, fibrin, and colonies of basophilic bacteria. The culture yielded beta-hemolytic Streptococcus spp. HE. Inset: chains of gram-positive cocci are associated with the epithelium. Pleomorphic gram-negative bacteria are also present. Gram stain.