title: ELISA detection of IgM antibodies against phenolic glycolipid-I in the management of leprosy: a comparison between laboratories.
abstract: IgM antibodies to the phenolic glycolipid-I (PGL-I) antigen of Mycobacterium leprae were detected by different ELISA techniques in three laboratories (in New York, Colorado, Seattle, U.S.A.). The agreement on seropositivity and overall correlation between techniques was excellent. A positive linear correlation between the bacterial index (BI) and anti-PGL-I IgM, previously reported by the New York laboratory, was detected by all techniques. The role of erythema nodosum leprosum in decreasing the relationship of BI versus anti-PGL-I IgM was seen by the New York laboratory with sera diluted 1:20 and ABTS substrate solution and by the Colorado laboratory but not by New York with sera at 1:300 and OPD substrate or by the Seattle laboratory.
mesh_terms: D000907:Antibodies, Bacterial / Q000032:analysis*; D000942:Antigens, Bacterial; D004797:Enzyme-Linked Immunosorbent Assay / Q000592:standards; D006017:Glycolipids / Q000276:immunology*; D006801:Humans; D007075:Immunoglobulin M / Q000032:analysis; D007918:Leprosy / Q000175:diagnosis* / Q000382:microbiology; D008991:Monitoring, Physiologic; D009166:Mycobacterium leprae / Q000276:immunology*; D012698:Serologic Tests / Q000592:standards
chemical_list: D000907:Antibodies, Bacterial; D000942:Antigens, Bacterial; D006017:Glycolipids; D007075:Immunoglobulin M; C045169:phenolic glycolipid I, Mycobacterium leprae