Abstract
The addition of 0.5% of a chitosan derivative to inactivated influenza vaccines injected parenterally resulted in a four or six to tenfold increase in antibody titres after a single-dose or two-dose intramuscular immunization of mice, respectively, in comparison with antibody titres after immunization without chitosan. Chitosan-adjuvanted vaccines enhanced antibody titers against drift variants of A- and B-type human influenza viruses four to six times compared with the vaccines without chitosan. Inactivated avian influenza virus A/H5N2 admixed with chitosan, when administered to mice challenged afterwards with the same virus, showed higher immunogenicity and protective efficacy compared with the antigen without chitosan.
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Acknowledgments
The authors are deeply grateful to Dr. Smirnov, who kindly provided us with the mouse-adapted avian influenza virus A/H5N2 strain that was needed for our investigations.
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Ghendon, Y., Markushin, S., Krivtsov, G. et al. Chitosan as an adjuvant for parenterally administered inactivated influenza vaccines. Arch Virol 153, 831–837 (2008). https://doi.org/10.1007/s00705-008-0047-4
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DOI: https://doi.org/10.1007/s00705-008-0047-4