Table 1.

Specificity of the commercial enzyme immunoassays (EIAs) for detecting Chlamydia trachomatis antibody when tested against a panel of Chlamydia psittaci/Chlamydia pneumoniae antibody positive sera as diagnosed by whole cell immunofluorescence assay

Commercial EIA	Number negative out of 36	Specificity (95% CI)
Medac Diagnostica	35	97.2% (85.5% to 99.9%)
Labsystems	34	94.4% (81.3% to 99.3%)
PBS Orgenics (Tracho PEP)	34	94.4% (81.3% to 99.3%)
Savyon Diagnostics (SeroCT)	33	91.7% (77.5% to 98.3%)
Vircell SL	21	58.3% (40.8% to 74.5%)
Genzyme Virotech	2	5.6% (0.68% to 18.7%)
Sanofi Pasteur (Platelia)	0	0% (0% to 9.7%)

CI, confdence interval.