This is a Proprietary Laboratory Analyses (PLA) code, meaning that the code describes only one unique lab test made by a specific manufacturer or performed by a specific lab. Code 0043U describes the Tick–Borne Relapsing Fever (TBRF) Borrelia ImmunoBlot IgM test from IGeneX Inc., which detects IgM antibodies to 4 recombinant protein groups of Borrelia, the tick–borne bacteria that causes Lyme disease.
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