with the three virus-antibody combinations tested , the optimum antiserum dilution for protein a plus antiserum treatment was found to be 1:100 or less , whereas in the case of grids treated with antiserum alone it ranged from 1:1000 to 1:2000 although the titre of the antisera ranged from 1:512 to 1:4096 .
C0003241
antibody
C0020960
antisera