title: Parasite-specific antibody profile in human fascioliasis: application for immunodiagnosis of infection.
abstract: The antibody isotype response to an adult Fasciola worm antigen preparation (FWAP) was examined in sera from 60 Egyptians with parasitologically confirmed fascioliasis by an ELISA. The FWAP-specific IgG1 and IgG4 antibodies were found in 97-100% of the patients. The ratio of the mean absorbance values between infected patients and healthy controls was 9.7 and 29.7 for IgG1 and IgG4 antibodies, respectively. The IgM, IgA, IgG2, and IgG3 antibodies were less dominant. In contrast to IgG1 antibodies, which were often detected in sera from patients infected with Schistosoma, Echinococcus granulosus, Ascaris lumbricoides, Ancylostoma duodenale, or Hymenolepis nana, FWAP-specific IgG4 antibodies were detected exclusively in the sera of patients with fascioliasis. The data thus support the conclusion that an IgG4/ELISA with crude FWAP as antigen may be used for sensitive and accurate immunodiagnosis of human fascioliasis.
authors.affiliation: Department of Immunology, Theodore Bilharz Research Institute, Giza, Egypt.
authors.forename: K
authors.initials: K
authors.lastname: Maher
authors.forename: R
authors.initials: R
authors.lastname: El Ridi
authors.forename: A N
authors.initials: AN
authors.lastname: Elhoda
authors.forename: M
authors.initials: M
authors.lastname: El-Ghannam
authors.forename: H
authors.initials: H
authors.lastname: Shaheen
authors.forename: Z
authors.initials: Z
authors.lastname: Shaker
authors.forename: H I
authors.initials: HI
authors.lastname: Hassanein
mesh_terms: D000293:Adolescent; D000328:Adult; D000818:Animals; D000871:Anthelmintics / Q000627:therapeutic use; D000909:Antibodies, Helminth / Q000097:blood / Q000145:classification; D000947:Antigens, Helminth / Q000737:chemistry / Q000276:immunology; D001562:Benzimidazoles / Q000627:therapeutic use; D004534:Egypt; D004797:Enzyme-Linked Immunosorbent Assay / Q000592:standards; D005209:Fasciola / Q000145:classification / Q000276:immunology*; D005211:Fascioliasis / Q000097:blood / Q000175:diagnosis* / Q000188:drug therapy / Q000276:immunology; D005260:Female; D006801:Humans; D007132:Immunoglobulin Isotypes / Q000097:blood / Q000145:classification*; D008297:Male; D008875:Middle Aged; D010504:Periodic Acid / Q000737:chemistry; D012680:Sensitivity and Specificity; D000077682:Triclabendazole
chemical_list: D000871:Anthelmintics; D000909:Antibodies, Helminth; D000947:Antigens, Helminth; D001562:Benzimidazoles; D007132:Immunoglobulin Isotypes; D010504:Periodic Acid; D000077682:Triclabendazole