title: An indirect immunofluorescence antibody test employing whole eggs as the antigen for the diagnosis of abdominal angiostrongyliasis.
abstract: Abdominal angiostrongyliasis is a potentially fatal zoonotic disease with a broad geographical distribution throughout Central and South America. This study assessed the performance of Angiostrongylus costaricensis eggs as the antigen in an indirect immunofluorescence assay for the determination of parasite-specific IgG and IgG1 antibodies. For prevalence studies, an IgG antibody titre ≥ 16 was identified as the diagnostic threshold with the best performance, providing 93.7% sensitivity and 84.6% specificity. Cross reactivity was evaluated with 65 additional samples from patients with other known parasitic infections. Cross reactivity was observed only in samples from individuals infected with Strongyloides stercoralis. For clinical diagnosis, we recommend the determination of IgG only as a screening test. IgG1 determination may be used to increase the specificity of the results for patients with a positive screening test.
authors: Departamento de Parasitología, Universidad de Costa Rica, San José, Costa Rica. elizabeth.abrahams@ucr.ac.cr
authors: Elizabeth
authors: E
authors: Abrahams-Sandi
authors: Paolo
authors: P
authors: Mesén-Ramírez
authors: Dimelsa
authors: D
authors: Suarez-Chacón
authors: Katherine
authors: K
authors: Fernández-Quesada
mesh_terms: D000005:Abdomen / Q000469:parasitology; D000801:Angiostrongylus / Q000276:immunology*; D000818:Animals; D000909:Antibodies, Helminth / Q000097:blood*; D000947:Antigens, Helminth; D019084:Fluorescent Antibody Technique, Indirect / Q000379:methods; D006801:Humans; D007074:Immunoglobulin G / Q000276:immunology*; D010063:Ovum / Q000276:immunology; D012680:Sensitivity and Specificity; D017206:Strongylida Infections / Q000175:diagnosis*
chemical_list: D000909:Antibodies, Helminth; D000947:Antigens, Helminth; D007074:Immunoglobulin G