Journal
ANALYTICAL CHEMISTRY
Volume 77, Issue 23, Pages 7673-7678Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ac0508797
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Funding
- NCRR NIH HHS [RR01315] Funding Source: Medline
- NIBIB NIH HHS [R01 EB003824, R01 EB003824-01] Funding Source: Medline
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Microsphere-based immunoassay by flow cytometry has gained popularity lately in protein detection and infectious disease diagnosis due to its capacity for multiplexed analysis and simple assay format. Here, we demonstrated the power of microsphere-based immunoassay for high-sensitivity detection and accurate differentiation of influenza viruses. The effects of sample volume and bead number on the assay sensitivity of viral antigen detection were studied. Compared to enzyme-linked immunosorbent assays, flow-based bead assays provided similar to 10-fold lower detection limit for viral particle detection and performed similarly for recombinant viral hemagglutinin protein detection. A four-plexed assay for influenza virus typing and influenza B virus sublineage characterization was developed to demonstrate the potential for multiplexed viral antigen detection and differentiation.
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