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Evaluation of five methods for respiratory syncytial virus detection
D C Halstead1, S Todd, G Fritch
1HealthEast Laboratories, Allentown Hospital-Lehigh Valley Hospital Center, Pennsylvania 18103.
Journal of Clinical Microbiology
|May 1, 1990
Summary
This study compared five methods for detecting respiratory syncytial virus (RSV). Enzyme immunoassays (EIA) and direct fluorescent-antibody (DFA) tests are effective alternatives to traditional RSV culture.
Area of Science:
- Virology
- Diagnostic Microbiology
- Clinical Laboratory Science
Background:
- Respiratory Syncytial Virus (RSV) is a common cause of respiratory infections.
- Accurate and rapid detection of RSV is crucial for patient management and infection control.
- Traditional cell culture methods for RSV detection can be time-consuming.
Purpose of the Study:
- To evaluate the performance of five different diagnostic methods for RSV detection in clinical specimens.
- To compare the sensitivity, specificity, and predictive values of direct fluorescent-antibody (DFA) tests and enzyme immunoassays (EIA) against RSV culture.
Main Methods:
- 117 nasal aspirate specimens were tested using cell culture, DFA, Directigen EIA, TestPack EIA, and RSV EIA.
- Results were validated by agreement of at least two methods or a positive RSV culture.
- Performance metrics including sensitivity, specificity, and predictive values were calculated for each method.
Main Results:
- 62 of 117 (53.0%) specimens were positive for RSV.
- Direct fluorescent-antibody (DFA) testing demonstrated high sensitivity (91.9%) and specificity (96.4%).
- TestPack EIA showed excellent performance with 93.6% sensitivity and 100% specificity, while Directigen and RSV EIA had lower sensitivities.
Conclusions:
- Newer enzyme immunoassay (EIA) kits and the direct fluorescent-antibody (DFA) method are viable alternatives to RSV cell culture.
- Selection of an RSV detection system should consider technical simplicity, turnaround time, performance, and cost.