Table 1.

IgA antibody to PspA of S. pneumoniae in NPS of children

SubjectAge (mo) at time ofa:IgA titera
NPS collectionColonizationTotal (μg/ml)Specific (ng/ml)Specific/ total (ng/μg)
Noncolonized
 12.53, 4, 5, 10<0.005<5
 24.0120.2<5
 34.15, 87.1<5
 44.209.5<5
 54.401.9<5
 64.507.65.00.658
 76.08, 1091.2<5
 89.000.8<5
 Mean ± SD4.8 ± 1.9a 16.9 ± 33.0c
Colonized
 13.93, 4, 6, 1076.0<5
 25.04, 638.017.80.469
 35.24, 104.7<5
 46.04, 5, 8, 1222.88.90.390
 57.53, 6, 8, 10, 127.1<5
 67.55, 619.0<5
 77.65, 8, 10, 127.6<5
 Mean ± SD6.1 ± 1.5b 25.0 ± 25.3d
  • a a versus b, P = 0.148; c versus d, P = 0.105.