Table 4.

Results of the spatial analysis for Campylobacter fetus subsp. venerealis in breeding bulls from extensive beef herds in Spain.

Clusters	Province	Population	Cases	Expected cases	Cases (%)	RRa	P-value
1	Principado de Asturias	169	48	13.97	28.4	3.81	<0.001
2	Salamanca	45	13	3.72	28.9	3.59	0.036
3	Cáceres	147	34	12.15	23.1	2.98	<0.001
4	Badajoz	29	17	2.40	58.6	7.39	<0.001
5	Cádiz	54	19	4.46	35.2	4.44	<0.001

^aRR, Relative risk.