title: The profile of IgG and IgG subclasses of onchocerciasis patients.
abstract: In this study Onchocerca gutturosa was compared with O. volvulus in an ELISA test to detect Onchocerca-specific IgG and IgG subclasses. The test was developed and standardized to detect Onchocerca-specific IgG and IgG subclasses in sera of onchocerciasis patients and endemic controls. Onchocerca volvulus and O. gutturosa crude water-soluble antigens showed no significant difference in detecting onchocerca-specific IgG antibody (T = 1.88, P greater than 0.05). The levels of IgG subclasses varied greatly. IgG4 showed the highest detected mean level (0.84 +/- 0.59) and the other three subclasses showed considerably lower mean levels (IgG1 = 0.27 +/- 0.16, IgG2 = 0.24 +/- 0.17, IgG3 = 0.28 +/- 0.12). The status and score of skin lesions were found to have significant effect on the IgG and IgG subclasses levels (all P less than 0.001). IgG4 showed a positive correlation with the microfilarial (Mf) load (r = 0.21, P less than 0.03). IgG3 levels have a significant negative correlation with the Mf load (r = -0.23, P less than 0.02). The biological significance of these IgG and IgG subclasses in onchocerciasis is discussed.
authors.affiliation: US NIH/Sudan Medical Parasitology Research Project, Khartoum, Sudan.
authors.forename: T H
authors.initials: TH
authors.lastname: Dafa'alla
authors.forename: H W
authors.initials: HW
authors.lastname: Ghalib
authors.forename: A
authors.initials: A
authors.lastname: Abdelmageed
authors.forename: J F
authors.initials: JF
authors.lastname: Williams
mesh_terms: D000293:Adolescent; D000328:Adult; D000818:Animals; D000909:Antibodies, Helminth / Q000096:biosynthesis / Q000097:blood* / Q000145:classification; D002648:Child; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006801:Humans; D007074:Immunoglobulin G / Q000096:biosynthesis / Q000097:blood* / Q000145:classification; D008297:Male; D008875:Middle Aged; D009854:Onchocerca / Q000276:immunology*; D009855:Onchocerciasis / Q000276:immunology*
chemical_list: D000909:Antibodies, Helminth; D007074:Immunoglobulin G