Table 2. Results of an AMOVA depicting the contribution of host populations and host individuals to the partitioning of genetic variation in E. coli isolates.

Source of variation	d.f.	Sum of squares	Variance components	Percentage variation	FST	P
Patristic distance
Among host populations	1	0.753	0.002	0.68	0.007	0.094
Among individual hosts within host populations	119	49.492	0.095	40.46	0.407	0.000
Within individual hosts	232	32.181	0.139	58.86	0.411	0.000
Haplotype distance
Among host populations	1	1.608	0.004	0.89	0.009	0.000
Among individual hosts within host populations	119	90.265	0.138	27.57	0.278	0.000
Within individual hosts	232	82.983	0.358	71.54	0.285	0.000