TABLE 1.

Reactivities of Western blot-positive pediatric sera with the Pgp3 ELISA and commercial serological assays

Sample no.aResult by the:
Pgp3 assay (absorbance at 450 nm)Medac pELISAb (AU/ml)SeroCT ELISAc (COI)Ani Labsystems EIAd (S/CO)
12.4910.63.89ND
21.9254.72.062.40
32.01313.94.084.36
41.7090.53.303.70
52.59145.65.024.52
62.4667.42.882.31
72.1848.71.572.00
  • a All seven samples were positive for C. trachomatis and C. pneumoniae by MIF at a dilution of 1:32.

  • b Results were considered negative at ≤28 AU/ml and positive at >28 AU/ml.

  • c COI, cutoff index. Results were considered negative at ≤1.1 and positive at >1.1.

  • d S/CO, signal-to-cutoff ratio. Results were considered negative at ≤1.4 and positive at >1.4. ND, not determined (insufficient serum available).