INFECTION developing in an arterial graft is recognized as a major complication of catastrophic proportions as attested by several reports.1,5,7-10 The present paper is based upon an experience in 12 such cases encountered on the General Surgical and Vascular Services of the Montefiore Hospital, since 1956. Material Between 1955 and 1962, a total of 201 arterial grafts were performed at the Montefiore Hospital by 11 attending surgeons. Table 1 lists the locations of the grafts. The occurrence of 12 cases of suppuration in this series represents, therefore, an incidence of 6%. Five attending surgeons scrubbed on the 12 cases of infection. The location and type of the grafts in the infected group are shown in Table 2. (One of these patients had the graft inserted originally at another institution, decreasing the incidence of suppuration in the cases originally done at this institution to just below 6%.) There were 11