Table 3.

Tolerance of the 370 Vibrio cholerae Isolates to 8 Heavy Metals

Heavy metal	MIC (μg/mL)											Resistant
	3.125	6.25	12.5	25	50	100	200	400	800	1,600	3,200	n	(%)
Ni2+							a
					3	24	223	82	38			120	32.4
Cd2+						a
				1	6	249	109	5				114	30.8
Cr3+									a
						1	7	119	243			0	0
Cu2+								a
					1	34	136	195	4			4	1.1
Pb2+									a
							5	8	355	2		2	0.5
Hg2+	a
	113	124	91	40	2							257	69.5
Zn2+							a
					1	102	241	26				26	7.0
Mn2+									a
				3	12	47	222	39	46	1		1	0.3

^aMIC of the quality control strain Escherichia coli K12.

MIC, minimal inhibitory concentration.