Abstract
The Binax™ NOW® immunochromatographic assay for respiratory syncytial virus was prospectively compared with direct fluorescent assay and viral culture at Primary Children's Medical Center, Salt Lake City, Utah during February 2003. Three hundred ten patient specimens were collected for testing, of which 102 specimens were positive for respiratory syncytial virus by the reference tests, direct immunofluorescence assay (DFA), and culture or molecular analysis. DFA analysis identified an additional 40 patient specimens positive for other respiratory viruses. Compared to the reference tests, the sensitivity, specificity, and positive and negative predictive values of the rapid immunochromatographic assay for detection of respiratory syncytial virus were 89.2%, 100.0%, 100.0%, and 94.9%, respectively. This rapid assay format proved to be cost-effective and simple to use in comparison to DFA and viral culture. Negative rapid test results should still be confirmed with a secondary test.
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