Table 1.

Detection of C. trachomatis and N. gonorrhoeae DNAs with the LCx and COBAS AMPLICOR systems after initial testinga

Organism and sexSpecimenResult with the LCx systemNo. of specimens with the following result with the COBAS AMPLICOR system:
PositiveNegativeTotal
C. trachomatis
 WomenSwabPositive58361
Negative7435442
Total65438503
UrinePositive491160
Negative4439443
Total53450503
 MenSwabPositive45247
Negative7444451
Total52446498
UrinePositive44953
Negative2443445
Total46452498
N. gonorrhoeae
 WomenSwabPositive606
Negative13484497
Total19484503
UrinePositive426
Negative7490497
Total11492503
 MenSwabPositive21021
Negative4473477
Total25473498
UrinePositive19120
Negative4474478
Total23475498
  • a For specimens with COBAS AMPLICOR negative or invalid results for the IC, C. trachomatis, andN. gonorrhoeae, all three assays were repeated. The results of the repeat tests are included here.