TABLE 1.

Determination of the presence of C. burnetii DNA in environmental samples from six states

State geographic region	No. of samples	No. of positive results	% Positive	Date of collection
Rocky Mountains	271	121	44.6	November 2006
South-central	285	103	36.1	December 2006
Upper Midwest	271	67	24.7	November 2007
West Coast	271	37	13.7	April 2008
East Coast	266	16	6.0	April 2008
Deep South	258	42	16.3	June 2008
Total	1,622	386	23.8