Indirect Fluorescent Antibody (IFA)
Antigen specific IgG and IgM titers allow rapid diagnosis of infection by one or more of the typhus fever group of rickettsial agents. This group includes Rickettsia typhi (endemic or maurine typhus) R. prowazeki (epidemic typhus), and Brill-Zinsswe disease caused by reactivation of latent R. prowazeki.
Screen: Not detected. Titer: < 1:64.
Even after infection has been treated, positive results may persist. False-positive reactions may occur during pregnancy.
1 - 5 days
- Febile Agglutinins
- Murine Typhus
- Weil-Felix Agglutinins
- Rickettsia typhi
- Typhus Fever Group Antibody
Collect blood in a red top or SST tube. Centrifuge, aliquot serum into plastic vial and refrigerate. EDTA (lavender top), heparinized (green top) or ACD (yellow top) plasma is also acceptable.
If IgG or IgM antibodies are detected the appropriate titer will be performed at an additional charge. By ordering this test the clinician acknowledges that additional reflex testing will be performed and billed at a separate additional charge if indicated. Test sent to Quest Diagnostics Nichols Institute of San Juan Capistrano.