Evaluation of replication and cross-reactive antibody responses of H2 subtype influenza viruses in mice and ferrets.
H2 influenza viruses have not circulated in humans since 1968, and therefore a large segment of the population would likely be susceptible to infection should H2 influenza viruses reemerge. The development of an H2 pandemic influenza virus vaccine candidate should therefore be considered a priority in pandemic influenza preparedness planning. We selected a group of geographically and temporally diverse wild-type H2 influenza viruses and evaluated the kinetics of replication and compared the ability of these viruses to induce a broadly cross-reactive antibody response in mice and ferrets. In both mice and ferrets, A/Japan/305/1957 (H2N2), A/mallard/NY/1978 (H2N2), and A/swine/MO/2006 (H2N3) elicited the broadest cross-reactive antibody responses against heterologous H2 influenza viruses as measured by hemagglutination inhibition and microneutralization assays. These data suggested that these three viruses may be suitable candidates for development as live attenuated H2 pandemic influenza virus vaccines.
Chen
Grace L
GL
Laboratory of Infectious Diseases, NIAID, NIH, Bethesda, Maryland 20892-3203, USA.
Lamirande
Elaine W
EW
Yang
Chin-Fen
CF
Jin
Hong
H
Kemble
George
G
Subbarao
Kanta
K
D000818:Animals; D057134:Antibodies, Neutralizing / Q000276:immunology; D000914:Antibodies, Viral / Q000097:blood*; D003429:Cross Reactions; D005260:Female; D005289:Ferrets; D006385:Hemagglutination Inhibition Tests; D053121:Influenza A Virus, H2N2 Subtype / Q000254:growth & development / Q000276:immunology; D009980:Influenza A virus / Q000254:growth & development* / Q000276:immunology*; D051379:Mice; D008807:Mice, Inbred BALB C; D009500:Neutralization Tests
D057134:Antibodies, Neutralizing; D000914:Antibodies, Viral