Among these are serologic tests that measure the levels of immunoglobulin M (IgM) against phenolic glycolipid-1 (PGL-1) (which may be detected by either native (anti-PGL-1) [2] or the synthetic mimetope natural disaccharide, typically linked to human serum albumin via an octyl (NDO-HSA) [3]) IgG against leprosy IDRI diagnostic 1 (LID-1) [4, 5] or both IgM and IgG against natural disaccharide octyl - leprosy IDRI diagnostic 1 (NDO-LID) [1]. The gene discussed is ALB; the disease is leprosy.