TABLE 1.
Results of all diagnostic tests evaluated for detection of C. trachomatis by using positive results by at least two tests as the criterion for inclusiona
| No. of specimens | Culture result | DFA assay result | PCR result | OIA result | No. of specimens positive by two-test minimum criterion |
|---|---|---|---|---|---|
| 20 | + | + | + | + | 20 |
| 2 | + | + | + | − | 2 |
| 3 | + | + | − | + | 3 |
| 5 | + | − | + | + | 5 |
| 9 | + | − | + | − | 9 |
| 3 | − | − | + | + | 3 |
| 10b | − | − | + | − | 0 |
| 1 | − | + | − | − | 0 |
| 253 | − | − | − | − | 0 |
a
Of 306 specimens tested, 39 were positive by culture, 26 were positive by DFA assay, 49 were positive by PCR, and 31 were positive by OIA. Forty-two specimens met the criterion of positivity by a minimum of two tests.
b
The culture transport media for 7 of 10 specimens which were only PCR positive were subsequently shown to contain C. trachomatis EBs by a modified DFA technique.