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. 2008 Oct 15;4:42. doi: 10.1186/1746-6148-4-42

Figure 1.

Figure 1

Location of sentinel herds for BT early detection from 2004–2007 in Switzerland. Background colour scheme represents risk zones in terms of general Culicoides habitat suitability for 2006. Black stars are location of sentinel herds involved in serological sampling, red stars indicate location of sentinel herds undergoing both serological and entomological sampling. Circles include herds which contributed data for this study.