TABLE 2.

MIC values to different antimicrobial compounds in 137 Campylobacter jejuni isolates from wild shorebirds (A), thrushes (B), and raptors (C)^a

Drug	Bird	Amt of drug (μg/ml)														n	Breakpoint for resistance (μg/ml)	Resistance
		0.125	0.25	0.5	1	2	4	8	16	32	64	128	256	512	1,024
Amoxicillin	All		1	2	2	23	31	45	28	5						137	>16	3.6
	A						1	8	26							35		0.0
	B		1	2	2	22	28	33	2	3						93		3.2
	C					1	2	4		2						9		22.2
Chloramphenicol	All					101	33	3								137	>16	0.0
	A					24	11									35		0.0
	B					68	22	3								93		0.0
	C					9										9		0.0
Ciprofloxacin	All	58	48	21	9			1								137	>2	0.7
	A	12	22	1												35		0.0
	B	38	26	20	9											93		0.0
	C	8						1								9		11.1
Doxycycline	All	101	25	7	2	1				1						137	>4	0.7
	A	34								1						35		2.9
	B	59	25	7	2											93		0.0
	C	8				1										9		0.0
Erythromycin	All			15	49	56	10	7								137	>16	0.0
	A			12	15	6	2									35		0.0
	B			1	28	49	8	7								93		0.0
	C			2	6	1										9		0.0
Gentamicin	All		70	67												137	>8	0.0
	A		35													35		0.0
	B		26	67												93		0.0
	C		9													9		0.0
Metronidazole	All			15	55	38	9	5	8	5	1	1				137	>4	14.6
	A			1	24	8			1	1						35		5.7
	B			12	28	30	9	3	7	3		1				93		15.1
	C			2	3			2		1	1					9		44.4
Nalidixic acid	All				1	2	45	47	38	3		1				137	>32	0.7
	A						8	22	5							35		0.0
	B						32	25	33	3						93		0.0
	C				1	2	5					1				9		11.1
Neomycin	All			63	66	7	1									137	>8	0.0
	A			34	1											35		0.0
	B			21	64	7	1									93		0.0
	C			8	1											9		0.0
Streptomycin	All				132	5										137	>8	0.0
	A				34	1										35		0.0
	B				89	4										93		0.0
	C				9											9		0.0

^aMICs are in micrograms per milliliter. Also given are MIC breakpoint values and the corresponding incidence of resistance (in percentages).