Table 6.

Dictyocaulus vivaparus prevalence based on bulk milk assay

Country (region)	Number of herds	Prevalence	Reference
Belgium	1,800	19.6%	[39]
Sweden	Organic herds 113	18%	[36]
	Conventional 113	9%
Germany (East Frisia)	906	12.8% Jan 07	[60]
		6.9% Sept 08
		6.6% Nov 08