TABLE 4.

Sensitivity and specificity of commercial IgG ELISAs compared to an anti-PT IgG in-house ELISA^a

ELISA	Sensitivity (%)	Specificity (%)
Euroimmun Pertussis IgG	91/91	90/90
Virion\Serion PT IgG	89/78	70/85
Virotech PT IgG	84/80	87/93
Dr.Merk Pertussis IgG	100	51
IBL Pertussis IgG	100	52
MP Biomedical Pertussis IgG	100	51
Novagnost Pertussis IgG	94	55
Novatec Pertussis IgG	95	54
Trinity Biotech Pertussis EIA	91	59
Virion\Serion Pertussis IgG	86	56
Virotech Pertussis IgG	87	81

^aIndeterminate results according to the kit's insert were interpreted as positive. Sensitivity and specificity of kits measuring anti-PT were also estimated when the in-house ELISA cutoff (≥40 IU/ml) was used (second number where two numbers are given).