Diagnosis of Q Fever

My colleagues and I compliment Dr. Fournier and coauthors on an excellent review (3). However, we were surprised to read the statement that there is no commercially available enzyme-linked immunosorbent assay (ELISA) for the serological detection of Q fever, since papers describing these assays have been published (1, 2, 4). These ELISAs, for the detection of specific immunoglobulin M (IgM), IgA, and IgG antibodies produced during Q fever, are...