TABLE 5.
Concordance of results from neutralization and HAI assays using postinfection ferret antiseraa
| Virus | Concordance with ferret antiserum against: |
||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jap/57b | Kras/59 | AA/6/60 | Berlin/64 | Berk/68 | pin/Prai/76 | mal/NY/78b | mal/Pot/83 | ck/NY/91 | dk/ Hok/01 | mal/Alb/02 | tern/Aus/04 | dk/ Hok/05 | dk/ Mng/06 | sw/MO/06b | |
| A/Jap/57 | + | + | + | + | + | − | + | + | + | − | − | − | − | + | − |
| A/Kras/59 | NAc | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| A/AA/6/60 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| A/Berlin/64 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| A/Berk/68 | − | − | + | + | + | + | + | + | + | + | + | + | + | − | + |
| A/pin/Prai/76 | + | − | − | − | + | + | + | − | + | − | − | − | − | + | + |
| A/mal/NY/78 | + | + | − | − | + | − | + | + | + | − | − | + | − | − | + |
| A/mal/Pots/83 | + | + | + | − | + | + | + | + | + | + | − | + | − | + | + |
| A/ck/NY/91 | − | + | − | − | + | + | + | − | + | − | − | + | − | + | − |
| A/dk/Hok/01 | + | + | + | − | + | − | + | − | + | + | − | + | − | + | + |
| A/mal/Alb/02 | − | − | − | − | + | − | + | − | − | − | + | + | − | − | + |
| A/tern/Aus/04 | + | + | + | − | + | + | + | + | − | + | − | + | − | + | + |
| A/dk/Hok/05 | + | + | − | + | + | − | + | − | − | − | − | − | + | − | − |
| A/dk/Mng/06 | + | + | + | + | + | + | + | − | + | + | − | + | − | + | + |
| A/sw/MO/06 | + | + | − | − | + | − | + | − | − | + | − | + | + | + | + |
a
A plus sign indicates concordant results; a minus sign indicates discordant results. No HAI data were available for Kras/59, AA/6/60, and Berlin/64, as 1% horse erythrocytes were used in the HAI assay. Ferret antisera were generated against the viruses indicated.
b
Antiserum with cross-neutralizing antibody detected by both assays to the greatest number of heterologous H2 subtype influenza viruses.
c
NA, HAI data not available.