Table 3.

Distribution of the results of 91 serum samples using the 4 Widal brands for anti-O antibodies in relation to their corresponding IgM anti-LPS ELISA results using a cut-off 1/160

Widal brand	anti-O titer ≥ 1/160	ELISA (91)				Total
		Positive (67)		Negative (24)
		Number	%	Number	%
Remel (91)	Negative	7	10.44	20	83.33	27
	Positive	60	89.55	4	16.66	64
Biosystems (91)	Negative	11	16.41	23	95.83	34
	Positive	56	83.58	1	4.16	57
Biotech (91)	Negative	13	19.4	20	83.33	33
	Positive	54	80.59	4	16.66	58
Dialab (91)	Negative	35	52.23	23	95.83	58
	Positive	32	47.76	1	4.16	33