Coxiella burnetii phase I antigen for diagnosing Q-fever by IFA

The antigen is used for the detection of antibodies against Coxiella burnetii in the blood serum samples of humans and animals by the indirect immunofluorescent assay (IFA). It is especially applied for the detection of Coxiella burnetii phase I IgG and IgA antibodies and thus, useful for both confirmation and therapeutic follow-up of the chronic Q fever in humans.