Table 2.

Agglutination of chicken and guinea pig red blood cells by pseudorevertant viruses under different conditionsa

VirusHAU
cRBCgpRBC
4°C, 2 h4°C, 2 h, and 37°C, 2 h37°C overnight4°C, 2 h4°C, 2 h, and 37°C, 2 h37°C overnight
H3N1 WT2561281282566464
A/PA/08/2008256001,0241280
Y98F/N81T64323212800
Y98F/S145I2561281285122560
Y98F/W222R256128128512256256
Y98F/I230M2561281282561280
Y98F/K238N25612812825600
PBS000000
  • a Chicken and guinea pig red blood cells (cRBC and gpRBC, respectively) were incubated with virus for 2 h at 4°C and then placed at 37°C. HAU were recorded after 2 h at 37°C and then again after an overnight incubation.