title: Evaluation of new hemagglutinin-based rapid antigen test for influenza A pandemic (H1N1) 2009.
abstract: BACKGROUND
  A new rapid antigen test (RAT), based on hemagglutinin, was developed for the improvement of influenza A pandemic (H1N1) 2009 detection.
  
  
  OBJECTIVE
  To evaluate the performance of the new RAT for the diagnosis of influenza A pandemic (H1N1) 2009.
  
  
  METHODS
  The new RAT included 2009 H1N1 hemagglutinin-based band and influenza A and influenza B nucleoprotein-based bands. During the period from November 24, 2009 to December 14, 2009, 948 patients underwent the new RAT and real-time reverse transcriptase polymerase chain reaction (rRT-PCR) at the same time. The result of the new RAT was compared with that of rRT-PCR, and the results of hemagglutinin-based and nucleoprotein-based antigen tests were compared.
  
  
  RESULTS
  Among the 260 patients confirmed by rRT-PCR, 153 (58.8%) were positive in the nucleoprotein-based antigen test, and 182 (70.0%) were positive in the hemagglutinin-based antigen test. These results show that the new hemagglutinin-based antigen test was more sensitive than the nucleoprotein-based antigen test for the detection of influenza A pandemic (H1N1) 2009 (p<0.001, the McNemar test).
  
  
  CONCLUSIONS
  The new hemagglutinin-based antigen test improved the sensitivity of diagnosis for influenza A pandemic (H1N1) 2009 and it might be helpful for the diagnosis of influenza A pandemic (H1N1) 2009.
authors.affiliation: Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea.
authors.forename: Young Keun
authors.initials: YK
authors.lastname: Kim
authors.forename: Young
authors.initials: Y
authors.lastname: Uh
authors.forename: Jin-Kyong
authors.initials: JK
authors.lastname: Chun
authors.forename: Changsoo
authors.initials: C
authors.lastname: Kim
authors.forename: Hyo Youl
authors.initials: HY
authors.lastname: Kim
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D005260:Female; D019267:Hemagglutinin Glycoproteins, Influenza Virus / Q000276:immunology; D006801:Humans; D007223:Infant; D053118:Influenza A Virus, H1N1 Subtype / Q000235:genetics / Q000276:immunology*; D007251:Influenza, Human / Q000175:diagnosis* / Q000276:immunology / Q000821:virology; D008297:Male; D008875:Middle Aged; D058873:Pandemics; D011237:Predictive Value of Tests; D020133:Reverse Transcriptase Polymerase Chain Reaction; D012680:Sensitivity and Specificity; D013997:Time Factors; D055815:Young Adult
chemical_list: C543345:H1N1 virus hemagglutinin; D019267:Hemagglutinin Glycoproteins, Influenza Virus