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Accuracy of Rapid Influenza Detection Test in Diagnosis of Influenza A and B Viruses in Children Less Than 59 Months Old

Chapter
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 788)

Abstract

Influenza burden among children is underestimated. Rapid influenza diagnostic tests (RIDTs) may be helpful in the early diagnosis of the disease, but their results should be interpreted cautiously. The aim of our study was to estimate the accuracy of the rapid influenza detection test BD Directigen™ EZ Flu A+B (Becton, Dickinson and Company, Sparks, MD) used among children with influenza-like illness (ILI) consulted in the ambulatory care clinics. A total number of 150 patients were enrolled into the study. The inclusion criteria were: age of the child less than 59 months, presentation of ILI according to CDC definition (fever >37.8 °C, cough, and/or sore throat in the absence of another known cause of illness), and duration of symptoms shorter than 96 h. In all patients two nasal and one pharyngeal swab were obtained and tested by RIDT, RT-PCR, and real time RT-PCR. For or influenza A(H1N1)pdm09, virus sensitivity of RIDT was 62.2 % (95 %CI 53.4–66.5 %), specificity 97.1 % (95 %CI 93.4–99 %), positive predictive value (PPV) 90.3 % (95 %CI 77.5–96.5 %), and negative predictive value (NPV) 85.7 % (95 %CI 82.4–87.3 %). For influenza B, virus sensitivity was 36.8 % (95 %CI 23.3–41.1 %), specificity 99.2 % (95 %CI 97.3–99.9 %), PPV 87.5 % (95 %CI 55.4–97.7 %), and NPV 91.5 % (95 % CI 89.7–92.1 %). We conclude that the RIDT immunoassay is a specific, but moderately sensitive, method in the diagnosis of influenza type A and is of low sensitivity in the diagnosis of influenza B infections in infants and children.

Keywords

Children Diagnosis Influenza Pharyngeal swabs Rapid influenza diagnostic test Virus 

Notes

Conflicts of Interest

The authors declare no conflicts of interest in relation to this article.

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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  1. 1.Department of Family MedicineWarsaw Medical UniversityWarsawPoland
  2. 2.Department of Influenza Research, National Influenza CenterNational Institute of Public Health – National Institute of HygieneWarsawPoland
  3. 3.Department of Epidemiology and Tropical MedicineMilitary Institute of MedicineGdyniaPoland
  4. 4.Department of Immunology, Faculty of BiologySzczecin UniversitySzczecinPoland

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