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. 2020 Jun 8;103(3):1276–1282. doi: 10.4269/ajtmh.19-0909

Table 1.

Real-time PCR sensitivity by sample collection method for Giardia duodenalis detection

Specimen group True positive False positive True negative False negative Sensitivity, % (95% CI)
Either stool sample 56 0 25 3 95 (86–99)
Stool replicate 1 55 0 25 4 93 (84–98)
Stool replicate 2 32 0 14 3 91 (77–98)
Either swab sample 40 0 25 19 68 (54–79)
Swab replicate 1 37 0 25 22 63 (49–75)
Swab replicate 2 25 0 9 14 64 (47–79)