Prevalence of Antibodies to Coxiella burnetii among Veterinary School Dairy Herds in the United States,2003

Prevalence of antibodies to Coxiella burnetii in 24 veterinary school–associated dairy herds in the United States was assessed through laboratory testing of bulk tank milk specimens by indirect immunoflourescent antibody assay. Twenty-two herds (92%) had evidence of antibodies to C. burnetii Phase I antibodies at a titer of ≥1:16, and nine herds (38%) had Phase I antibody titers of ≥1:256. These results suggest that C. burnetii infection is geographically widespread among dairy herds in the United States. Vector-Borne Zoonotic Dis. 5, 90–91.