Haemagglutination inhibition
Materials
Thawed serum samples in racks
V-bottom microwell plates and covers
PBS
1 percent washed red blood cells
V-bottom reagent trough
25 µL single and multichannel pipettes and tips
Microwell plate recording sheet.
Newcastle disease virus antigen diluted to 4 HA units per 25 µL
Standard positive and negative serum