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 0044U describes the Tick–Borne Relapsing Fever (TBRF) Borrelia ImmunoBlots IgG test from IGeneX Inc., which detects IgG antibodies to four species of Borrelia, the tick–borne bacteria that causes Lyme disease.
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