Performance of indirect immunofluorescence assay, immunochromatography assay and reverse transcription-polymerase chain reaction for detecting human respiratory syncytial virus in nasopharyngeal aspirate samples

Mem Inst Oswaldo Cruz. 2008 Aug;103(5):463-7. doi: 10.1590/s0074-02762008000500009.

Abstract

Comparison of the use of indirect immunofluorescence assay (IFA), immunochromatography assay (ICA-BD) and reverse transcription-polymerase chain reaction (RT-PCR) for detecting human respiratory syncytial virus (HRSV) in 306 nasopharyngeal aspirates samples (NPA) was performed in order to assess their analytical performance. By comparing the results obtained using ICA-BD with those using IFA, we found relative indices of 85.0% for sensitivity and 91.2% for specificity, and the positive (PPV) and negative (NPV) predictive values were 85.0% and 91.2%, respectively. The relative indices for sensitivity and specificity as well as the PPV and NPV for RT-PCR were 98.0%, 89.0%, 84.0% and 99.0%, respectively, when compared to the results of IFA. In addition, comparison of the results of ICA-BD and those of RT-PCR yielded relative indices of 79.5% for sensitivity and 95.4% for specificity, as well as PPV and NPV of 92.9% and 86.0%, respectively. Although RT-PCR has shown the best performance, the substantial agreement between the ICA-BD and IFA results suggests that ICA-BD, also in addition to being a rapid and facile assay, could be suitable as an alternative diagnostic screening for HRSV infection in children.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acute Disease
  • Child, Preschool
  • Chromatography* / methods
  • Fluorescent Antibody Technique, Indirect*
  • Humans
  • Nasal Lavage Fluid / virology
  • Nasopharynx / virology
  • Predictive Value of Tests
  • RNA, Viral / genetics
  • Respiratory Syncytial Virus Infections / diagnosis*
  • Respiratory Syncytial Virus, Human* / genetics
  • Respiratory Syncytial Virus, Human* / immunology
  • Reverse Transcriptase Polymerase Chain Reaction*
  • Sensitivity and Specificity

Substances

  • RNA, Viral