Chronic hemodialysis centers in the United States were surveyed in 1995 regarding a number of hemodialysis associated diseases and practices. A total of 2,647 centers, representing 224,954 patients and 54,194 staff members, responded. Seventy-seven percent of centers reported that they reused disposable dialyzers. At the end of 1995, 65% of patients were treated with an arteriovenous graft, 22% an arteriovenous fistula, and 13% a temporary or permanent central catheter. By the end of 1995, at least three doses of hepatitis B vaccine had been administered to 35% of patients and to 82% of staff members. Acute infection with the hepatitis B virus (HBV) occurred in 0.06% of patients, and was more likely to be reported by centers with lower proportions of patients vaccinated against HBV. The prevalence of antibody to hepatitis C virus (HCV) was 10.4% among patients and 2.0% among staff. At least one patient with vancomycin resistant enterococci (VRE) was reported by 11.5% of centers, more commonly by hospital (vs freestanding centers not located in hospitals) and government centers, and centers located in certain geographic areas. Vancomycin was received by 7.2% of patients in December 1995. The percentage of centers reporting patients with other pathogens was 7.9% for active tuberculosis, 39% for human immunodeficiency virus (HIV), and 40% for methicillin resistant Staphylococcus aureus (MRSA).