Table 4.

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 1/320

Widal brand	anti-O titer ≥ 1/320	ELISA (91)				Total
		Positive (67)		Negative (24)
		Number	%	Number	%
Remel (91)	Negative	27	40.29	24	100.00	51
	Positive	40	59.7	0	0.00	40
Biosystems (91)	Negative	36	53.73	24	100.00	60
	Positive	31	46.26	0	0.00	31
Biotech (91)	Negative	43	64.17	24	100.00	67
	Positive	24	35.82	0	0.00	24
Dialab (91)	Negative	65	97.01	24	100.00	89
	Positive	2	2.98	0	0.00	2