title: Establishment and application of SPA-co-operated ELISA for detection of anti-HCV-IgM.
abstract: A staphylococcus aureus protein A co-operated ELISA (SPA-ELISA) for the detection of anti-HCV-IgM has been established using HCV antigenic polypeptide, SPA-bearing germs and horseradish peroxidase labelled anti-human IgM. The specificity of SPA-ELISA has been confirmed by some substitution tests, blocking tests and destroying test with 2-mercaptoethanol. The results showed that the rate of anti-HCV-IgG in a group of patients with acute hepatitis and there were significant difference in anti-HCV-IgM was higher than that of anti-HCV-IgM detected rates between patients with acute hepatitis and those with chronic hepatitis (32.26%, P < 0.01). On the other hand, the positive rates of anti-HCV-IgM were 53.66% and 63.41% in transfusion associated hepatitis, 38.10% and 42.86% in sporadic hepatitis, 6.11% and 16.33% in people who have had active social activities, 40.00% and 10.00% in a group of blood donors respectively. Furthermore, taking into account the characteristics of HCV polypeptide used, its easiness of manipulation, and elimination of the interference of anti-HCV-IgG in sera, the new SPA-ELISA is believed to be of practical value in clinical and epidemiological studies of hepatitis C.
authors.affiliation: Clinical Immunology Research Unit, Tongji Hospital, Tongji Medical University, Wuhan.
authors.forename: F H
authors.initials: FH
authors.lastname: Li
authors.forename: L S
authors.initials: LS
authors.lastname: Guo
authors.forename: Z Q
authors.initials: ZQ
authors.lastname: Yu
authors.forename: Y K
authors.initials: YK
authors.lastname: Wang
authors.forename: J Y
authors.initials: JY
authors.lastname: Qi
authors.forename: X W
authors.initials: XW
authors.lastname: Yuan
authors.forename: L J
authors.initials: LJ
authors.lastname: Hao
mesh_terms: D004797:Enzyme-Linked Immunosorbent Assay / Q000379:methods*; D006508:Hepatitis Antibodies / Q000097:blood*; D006526:Hepatitis C / Q000276:immunology; D018937:Hepatitis C Antibodies; D006801:Humans; D007075:Immunoglobulin M / Q000097:blood*; D013205:Staphylococcal Protein A
chemical_list: D006508:Hepatitis Antibodies; D018937:Hepatitis C Antibodies; D007075:Immunoglobulin M; D013205:Staphylococcal Protein A