Table 3.

Summary of strains from the national survey that were either present in both cross-sectional surveys or present at more than one practice^a

Strain	Presence in cross-sectional survey		No. of practices where strain was present	No. of sequences	Maximum distance
	CS1	CS2			km	DNA (%)
A	✓	✓	1	5	3–26	0–13
E	✓	✓	2	2	70	19
J	✓		2	2	29	18
Lc	✓	✓	5	8	2–438	0–18
U	✓	✓	1	2	2	17
W	✓	✓	2	2	205	20
Z	✓	✓	1	2	IOMb	18

^aStrain identity is the same as that in Fig. 2.

^bIsle of Man. No postcode data were available; the size of the island is 52 km by 22 km (http://www.gov.im/isleofman/geography.xml).

^cStrain L is phylogenetically related to FCV F9.