TABLE 1.

Campylobacter strains used in this study

Straina	Speciesb	Yr of isolation	Farmc		Straina	Speciesb	Yr of isolation	Farmc
C144	C. jejuni	1990	B		C2446	C. jejuni	1992
C350	C. jejuni	1990	A		C2450	C. jejuni	1992
C356	C. jejuni	1990	A		C2461	C. jejuni	1992
C591	C. jejuni	1990	A		C2466	C. coli	1992
C626	C. coli	1990	B		C2470	C. coli	1992
C690	C. jejuni	1990	B		C2476	C. jejuni	1992
C2143	C. jejuni	1992			C2481	C. jejuni	1992
C2146	C. jejuni	1992			C2485	C. coli	1992	B
C2150	C. jejuni	1992			C2498	C. coli	1992
C2152	C. coli	1992			C2505	C. coli	1992
C2155	C. coli	1992			C2515	C. jejuni	1992
C2246	C. jejuni	1992			C2520	C. coli	1992
C2264	C. jejuni	1992			C2535	C. jejuni	1992
C2345	C. jejuni	1992			C2540 (G)	C. coli	1992
C2355	C. coli	1992			C2545	C. coli	1992
C2360	C. jejuni	1992	C		C2551 (Dk)	C. coli	1992
C2362	C. jejuni	1992	C		C2555	C. jejuni	1992
C2375	C. coli	1992			C2605	C. coli	1992
C2380	C. coli	1992			C2609 (B)	C. jejuni	1992
C2385	C. coli	1992			C2641	C. jejuni	1992
C2390	C. coli	1992			C2651	C. jejuni	1993
C2400 (B)	C. coli	1992			C4596	C. coli	1997	D
C2412	C. jejuni	1992			C4601	C. coli	1997	D
C2436	C. coli	1992			C4602	C. coli	1997	D
C2441	C. jejuni	1992			C4611	C. coli	1997	D

^aAll strains were isolated in The Netherlands (9), except those indicated with (B), (G), or (Dk), which were isolated in Belgium, Germany, or Denmark, respectively (9). 

^bStrains were tested according to the multiplex PCR described by van de Giessen et al. (23). 

^cStrains with the same letter are from the same farm.