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Cites a study in Spain which evaluates the utility of a commercial enzyme immunoassay (EIA) as a screening test for detecting HIV-1 antibody in urine samples of high-risk populations. Results of urine and serum testing of patients who attended a sexually transmitted diseases clinic; Values of sensitivity and specificity obtained for the urine EIA; Consideration of the obtained values as acceptable for surveillance purposes particularly in populations with a high prevalence of HIV infection.