Table 1.

Plaque reduction-neutralization titers for YF/JE chimeras and parental viruses

VirusResult fora:
NI-ASYF-ASJE-ASNI-IgGYF-IgG
YF5.2iv<1.33.7<1.3<2.2>4.3
JE SA14-14-2<1.3<1.33.4<2.2<2.2
YF/JE-S<1.3<1.33.1<2.2<1.9
YF/JE-N<1.3<1.33.4<2.2<2.2
JE-N<1.3<1.33.4<1.5<1.5
  • a Values are the log reciprocal of the dilution yielding 50% neutralization, based on 100 PFU on LLC-MK2 cells. NI-AS, YF-AS, and JE-AS are nonimmune, YF hyperimmune, and JE hyperimmune ascitic fluids, respectively. NI-IgG and YF-IgG are purified Ig as described in Materials and Methods.