Estimated herd prevalence and sequence types of Coxiella burnetii in bulk tank milk samples from commercial dairies in Indiana

Table 1 Geographic distribution of dairy herds and estimated herd prevalence of C. burnetii

Region	Total regional herds^a	%Total herds	Total samples	%Total samples	Samples tested	%Samples tested	Positive samples	% Positive samples	Estimated prevalence	95 % C.I.
North	1622	67.6 %	845	72.4 %	217	68.7 %	129	66.8 %	59.4 %	52.8–65.8 %
Central	408	17.0 %	173	14.8 %	57	18.0 %	40	20.7 %	70.1 %	57.4–81.0 %
South	371	15.4 %	149	12.8 %	42	13.3 %	24	12.4 %	57.1 %	42.0–71.4 %
Total	2401		1167		316		193		60.8 %	55.3–66.0 %

^aTotal Regional Herds obtained from the 2012 Census of Agriculture [37]. These numbers include, but are not exclusive to, commercial dairy herds

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