Table 1. Campylobacter strains used to feed the asymmetric island model for source attribution.

Country	Human	Chicken	Cattle	Sheep	Pig	Environment	Reference
The Netherlands	980†	210	9	0	13	106 (water)	[30] and data‡
United Kingdom	0	0	46	72	5	50 (sand)	[21]
Scotland	0	0	90	88	15	133 (wild birds)	[25]
Switzerland	0	0	23	0	100	0	[31]
Total	980	210	168	160	133	289

^†Obtained from the CaSa study [10].

^‡Provided by the Central Veterinary Institute (CVI) in Lelystad, The Netherlands.