On Sept. 8, Hl52, a three year- old mare of mixed breeding was admitted to Stange Memorial Clinic. The history was recorded as follows: In June of 1952, the mare had received a deep laceration on the dorsal surface. of the right fore leg in the middle of the third metacarpal bone. The wound was treated at this time and healing apparently took place; however, in about three weeks a purulent discharge occurred at the site of the original wound. Treatment was repeated with similar results. There were two recurrences of the condition before the patient was presented at the clinic.