Table 1.

Urine specimens from pregnant and nonpregnant women showing complete or partial inhibition for PCR, LCR, or TMA tests

GroupNo. (%) of inhibitorya urine specimens
PCRLCRTMA
CompletePartialTotalCompletePartialTotalCompletePartialTotal
Pregnant (n = 101)10 (9.9)2 (1.9)12 (11.9)1 (1.0)2 (2.0)3 (2.9)7 (6.9)5 (5.0)12 (11.9)
Nonpregnant (n = 287)9 (3.1)6 (2.1)15 (5.2)9 (3.1)3 (1.0)12 (4.2)22 (7.7)12 (4.1)34 (11.8)
 Total (n = 388)19 (4.9)8 (2.1)27 (7.0)10 (2.6)5 (1.3)15 (3.9)29 (7.5)17 (4.4)46 (11.9)
  • a Complete inhibition was defined as a reduction in the signal to a level below the cutoff for positivity in each assay; partial inhibition was defined as greater than 20% but less than 100% of the signal achieved by the positive control spike.