Table 5.

Differentiation of stx₁ and stx₂ in clinical specimens compared to bidirectional sequencing

Gene target(s)	Resultsa				Performance (% [95% CI])b
	TP	FP	TN	FN	Sensitivity	Specificity
stx1	16	1c	1,227	0	100 (76–100)	99.9 (99–100)
stx2	9	0	1,235	0	100 (63–100)	100 (99–100)
stx1 + stx2	11	0	1,233	0	100 (68–100)	100 (99–100)

^aTP, true positive; FP, false positive, TN, true negative; FN, false negative.

^bCI, confidence interval.

^cIdentified as stx₁ by the ProGastro SSCS assay and was negative by EIA and bidirectional sequencing analysis.