TABLE 2.

Correlations between clade 1 subclades and clinical isolates

	Human	Other	Total
Clade1-1	2	36	38
Other	16	110	126
P＝0.2494	18	146	164
Clade1-2	4	46	50
Other	14	100	114
P＝0.5890	18	146	164
Clade1-3	12	64	76
Other	6	82	88
P＝0.3184	18	146	164
Clade1-3 (toxin high production)	7	12	19
Other	11	134	145
P＝0.0013	18	146	164