However, a titer ≥1:160 may also titer reflect past infection. In the presence of compatible symptoms, a Francisella tularensis antibody titer of 1:160 or greater in an titer acute specimen supports a presumptive diagnosis of tularemia. Antibodies may be elevated many years after infection. Test may demonstrate crossreactivity with brucella, Proteus OX-19, and Yersinia species. Set up: Tues-Sat Report available: 2-4 days This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes. It has not been cleared or approved by FDA. This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics.
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