TABLE 1.

Median OPA titer of pre- and postvaccination sera to Pnc serotypes 15B and 15C

Serum sampleMedian OPA titera
Serotype 15B (PPV-23)Serotype 15C (non-PPV-23)
DS4304-03DS4063-03DS4160-02DS1615-95DS3594-02DS5453-02
Prevaccination
    708444444
    712444444
    714444444
    722444444
    760444444
    7804432444
    762444444
    766444444
Postvaccination
    75651225651232464
    75812851244644
    7682,0482,0482,0483244
    7701,0242,0482,048444
    772444444
    774444444
    776444444
    IG256256256646464
  • a An OPA titer of <8 was reported as a titer of 4. Experiments were performed in duplicate on two to three separate assay days. All strains of serotypes 15B and 15C were genotyped to ST199.