Fig. 1

Geographic distribution of samples tested for C. burnetii. Indiana counties with bulk tank milk samples tested for C. burnetii. Counties with bulk tank milk samples that tested positive for C. burnetii are coded green. Thick lines indicate the regional boundaries that were defined by Public Health Preparedness Districts. Dots indicate the number of dairy herds per county in 2012 as reported by the USDA National Census of Agriculture. Counties without dots were not reported as individual counties but included in the overall total of 2401 dairy herds