[Source: US National Library of Medicine, full page: (LINK). Abstract, edited.]
Viral Immunol. 2019 May 9. doi: 10.1089/vim.2019.0010. [Epub ahead of print]
Hemagglutination Inhibition Antibody Response Following Influenza A(H1N1)pdm09 Virus Natural Infection: A Cross-Sectional Study from Thirthahalli, Karnataka, India.
Alladi CSH1, Jagadesh A1, Prabhu SG1, Arunkumar G1.
Author information: 1 Manipal Centre for Virus Research, Manipal Academy of Higher Education (MAHE), Manipal, India.
Influenza viruses are major respiratory pathogens that cause seasonal epidemics and occasional pandemics. Immune response to influenza viruses is majorly targeted against the hemagglutinin antigen. A laboratory-based retrospective cross-sectional study was conducted on 50 acute and 50 follow-up samples to assess the immune response to influenza A(H1N1)pdm09 virus after natural infection and detect the presence of pre-existing antibodies against influenza A(H3N2) and influenza B viruses. Two-fourfold rise in hemagglutination-inhibition (HAI) titer was observed in 100% of the follow-up samples for influenza A(H1N1)pdm09 virus. No change in HAI titers for influenza A(H3N2) and influenza B viruses was observed.
KEYWORDS: hemagglutination-inhibition assay; immune response; influenza virus; pre-existing antibodies
PMID: 31070522 DOI: 10.1089/vim.2019.0010
Keywords: Pandemic Influenza; H1N1pdm09; Serology; India.