TABLE 2.

IgA seropositivity rates at different titer cutoff points

IgA cutoff	% IgA seropositivity determined with the following test or conjugate:
	Reference	Sigma	Labsystems	Dako	Jackson	Caltag	Zymed	Labsystems MIF kit	Labsystems EIA kit
≥10	38	32	31	39	36	29	33	46	54
≥20	26	23	22	25	23	18	21	28	36
≥40	26	23	21	25	22	18	21	28	20
≥80	17	12	10	14	12	7	11	15	4
≥160	10	5	3	11	6	3	8	8