Table 2.

Detection of G. duodenalis cyst antigens in stool samples by sandwich ELISA

Groups	Positive cases		Negative cases
	X ± SD	No.	X ± SD	No.
Healthy volunteers (25)			0.21 ± 0.01	25
G. duodenalis infected patients (100)	0.72 ± 0.01	97	0.25 ± 0.05	3a
Cryptosporidium (10)	0.11 ± 0.11	2b	0.21 ± 0.14	8
E. histolytica (10)	0.21 ± 0.16	1b	0.12 ± 0.03	9
E. coli (10)	0.23 ± 0.01	1b	0.14 ± 0.03	9

X: mean OD reading at 492 nm

^aFalse − ve results

^bFalse + ve results

SD standard deviation