Table 2. Analysis of molecular variance (AMOVA) when grouping isolates according to host and year of isolation using either concatenated MLST sequences or flaB sequences.

	assigned variance
C. jejuni	MLST	flaB
among years within hosts	1.6% (p<0.001)	2.0% (p<0.001)
among hosts	4.6% (p=0.008)	0.6% (p=0.178)
within hosts and years	93.8% (p<0.001)	97.4% (p<0.001)
C. coli
among years within hosts	10.6% (p<0.001)	24.6% (p<0.001)
among hosts	7.9% (p=0.089)	7.4% (p=0.603)
within hosts and years	81.5% (p<0.001)	68.0% (p<0.001)

For each source only years with more than 10 samples were included.