Human influenza A virus (H5N1) detection by a novel multiplex PCR typing method.
We report the use of ResPlex III for genotyping influenza A viruses. The performance characteristics of the assay with regard to H5N1 are further evaluated. The ResPlex system incorporates a novel multiplex PCR technology, target-enriched multiplex PCR, to simultaneously amplify multiple molecular targets in one reaction. The ResPlex III assay targets the H1, H2, H3, H5, H7, H9, N1, and N2 genes from the influenza A virus as well as the NS genes from influenza A (NSA) and B (NSB) viruses, providing detection and genotyping of influenza A and B viruses. The analytical sensitivities for detecting the H5, N1, and NSA genes were 1, 10(-1), and 10 50% tissue culture infectious doses/200 microl/reaction, respectively. A total of 217 sequential clinical samples including 14 samples with human H5N1 infections were tested by the ResPlex III assay, and the results were compared to a reference standard combined with results of viral culture and conventional reverse transcriptase and real-time PCR. The clinical sensitivity and specificity for detecting H5N1 were 93.3% and 100%, respectively, indicating that different subtypes of influenza A virus can be quickly and correctly identified using the ResPlex III genotyping approach.
Zou
Shumei
S
Chinese Center for Disease Cantrol and Prevention, National Institute for Viral Disease Control and Prevention, State Key Laboratory of Infectious Disease Control and Prevention, Xuanwu District, Beijing 10052, People's Republic of China.
Han
Jian
J
Wen
Leying
L
Liu
Yan
Y
Cronin
Kassi
K
Lum
Shanjuan H
SH
Gao
Lu
L
Dong
Jie
J
Zhang
Ye
Y
Guo
Yuanji
Y
Shu
Yuelong
Y
D006801:Humans; D053124:Influenza A Virus, H5N1 Subtype / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification; D009980:Influenza A virus / Q000145:classification / Q000235:genetics / Q000302:isolation & purification; D007251:Influenza, Human / Q000175:diagnosis* / Q000821:virology; D016133:Polymerase Chain Reaction / Q000379:methods*; D011933:Reagent Kits, Diagnostic; D012015:Reference Standards; D020133:Reverse Transcriptase Polymerase Chain Reaction; D012680:Sensitivity and Specificity; D014776:Virus Cultivation
D011933:Reagent Kits, Diagnostic