Serum antibody responses in rhesus macaques infected with the indicated APMV.*

*This is continuation of the experiment described in Tables? 2 and 3. Serum samples were collected before inoculation on day 0, and after inoculation on days 21 and 28.†The hemagglutination inhibition (HI) titer is expressed as the mean reciprocal log2 (± standard errors of the mean) of the highest serum dilution causing complete inhibition of four HA units of the indicated APMV, except for APMV-5, which was evaluated by neuraminidase inhibition (NI) assay. All the values are averages from three independent experiments. The mean serum HI titers in all the day 0 serum samples were 0.‡The serum neutralizing antibody titers were expressed as mean reciprocal log2 of the serum dilution resulting in complete neutralization of infection in 50% of the wells (mean ± standard errors of the mean). The limit of detection is 0. The mean neutralizing antibody titers in all the day 0 serum samples were 0.§The antibody response to APMV-5 was evaluated by NI assay as described in Materials and Methods. The NI titer is expressed as the mean reciprocal log2 (± standard errors of the mean) of the highest serum dilution causing neuraminidase inhibition.