Journal
JOURNAL OF CLINICAL VIROLOGY
Volume 43, Issue 2, Pages 241-243Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jcv.2008.06.012
Keywords
Avian influenza; Enzyme-linked immunosorbent assay; Hemagglutination inhibition test; Microneutralization; Anti body-absorption
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Funding
- Australian Government Department of Health and Ageing
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Background and objectives: Commercial serological assays to determine influenza A H5N1 infection are available, although the accuracy and reproducibility of these are not reported in detail. This study aimed to assess the validity of a commercial ELISA H5 hemagglutinin (HA) antibody kit. Study design: A commercial ELISA for detection of antibodies towards influenza A H5 HA was evaluated using human sera from vaccinated individuals. The ELISA was used to screen 304 sera with elevated influenza A complement fixation titres collected between the period 1995-2007. Results and conclusions: The ELISA was found to be accurate for sera with high levels of anti-H5 antibodies, and would be useful in clinical settings where a rapid result is required. Thirteen of the stored sera were positive using the ELISA, but were confirmed as negative for H5N1 exposure using further serological tests. Absorption studies suggested that antibodies towards seasonal H3N2 and H1N1 influenza may cross-react with H5 antigen, giving false positive results with the ELISA. (C) 2008 Elsevier B.V. All rights reserved.
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