Fig. 1
From: Mean effective sensitivity for Mycobacterium avium subsp. paratuberculosis infection in cattle herds
Density distributions of mean effective sensitivity (MES) calculated for different cattle subpopulations. Dairy herds: Group 1 = all cattle; Group 2 = all cattle > 2 years; Group 3 = all cattle above 2 years of age in the control programme. Non-dairy herds: Group 4 = all cattle in herds with at least 25 animals; Group 5 = all cattle in herds with at least 25 animals that were above 2 years of age; Group 6 = all cattle at least 2 years of age in herds with more than 25 animals that were at least 2 years of age