Abbott Laboratories 1 month following the completion of their study because of unsatisfactory performance.4 There¬ fore, the generalized conclusions of their study, based on a single severely flawed test, may be invalid. Screening with a rapid chlamydial test followed immediately by on-site treat¬ ment of individuals with positive test results may be equally or more efficacious than the clinical approach of culturing followed by requests for individuals with positive test re¬ sults to return to the clinic for treatment. The one-visit clinical approach merits greater use, particularly for nontertiary care rural clinics geographically removed from ac¬ cess to chlamydial cultures, than the two-visit clinical approach. TC. Use of cell culture and a rapid diagnostic assay for Chlamydia trachomatis screening. JAMA. 1994;272:867-870. 2. Ferris DG, Martin WH, Fischer PM, Petry LJ. A comparison of rapid enzyme immunoassay tests for the detection of Chlamydia trachomatis cervical infections. Noninvasive detection of Chlamydia trachomatis urethritis in men by a rapid enzyme immunoassay test. J Fam Pract. 1991;33:73-78. 4. Ferris DG, Martin WH. A comparison of three rapid chlamydial tests in pregnant and nonpregnant women. J Fam Pract. 1992;34:593-597. 5. Ferris DG, Fischer PM. Elementary school students' performance with two ELISA test systems. JAMA. 1992;268:766-770.