. 2018 Nov 5;99(6):1613–1618. doi: 10.4269/ajtmh.18-0538

Table 2.

Comparison of Giardia lamblia sensitivity between whole stool samples and stool samples stored on Whatman protein saver cards

Application method	DNA extraction method	High parasite load* (N = 10)	Low parasite load† (N = 10)	All samples (N = 20)
Application method	DNA extraction method	Sensitivity (95% CI)	Sensitivity (95% CI)	Sensitivity (95% CI)
Whole stool directly on Whatman cards	Qiagen	100% (95% CI: 69%, 100%)	90% (95% CI: 56%, 100%)	95% (95% CI: 75%, 100%)
Whole stool directly on Whatman cards	Chelex	100% (95% CI: 69%, 100%)	60% (95% CI: 26%, 88%)	80% (95% CI: 56%, 94%)
Stool suspension on Whatman cards	Qiagen	100% (95% CI: 69%, 100%)	70% (95% CI: 35%, 93%)	85% (95% CI: 62%, 97%)
Stool suspension on Whatman cards	Chelex	100% (95% CI: 69%, 100%)	60% (95% CI: 26%, 87%)	80% (95% CI: 56%, 94%)

CI = confidence interval.

* Whole stool ct value < 30.

† Whole stool ct value ≥ 30.