TABLE 1.

Effect of adding C. trachomatis EBs to urine specimens from pregnant and nonpregnant women before processing by the APTIMA Combo 2 and LCx assays

PopulationNo. of negative urine specimens/total no. of C. trachomatis EB-spiked urine specimens (%)
APTIMA Combo 2 assayLCx assay with 12 EBs
12 EBs1 EB
Pregnant women0/190 (0)3/119 (2.5)19/159 (11.9)
Nonpregnant women2/225 (0.89)4/125 (3.2)25/179 (13.9)
    All women2/415 (0.48)7/244 (2.9)44/338 (13.0)