title: Monoclonal antibody-based dipstick assay: a reliable field applicable technique for diagnosis of Schistosoma mansoni infection using human serum and urine samples.
abstract: A field applicable diagnostic technique, the dipstick assay, was evaluated for its sensitivity and specificity in diagnosing human Schistosoma mansoni infection. A monoclonal antibody (mAb) against S. mansoni adult worm tegumental antigen (AWTA) was employed in dipstick and sandwich ELISA for detection of circulating schistosome antigen (CSA) in both serum and urine samples. Based on clinical and parasitological examinations, 60 S. mansoni-infected patients, 30 patients infected with parasites other than schistosomiasis, and 30 uninfected healthy individuals were selected. The sensitivity and specificity of dipstick assay in urine samples were 86.7% and 90.0%, respectively, compared to 90.0% sensitivity and 91.7% specificity of sandwich ELISA. In serum samples, the sensitivity and specificity were 88.3% and 91.7% for dipstick assay vs. 91.7% and 95.0% for sandwich ELISA, respectively. The diagnostic efficacy of dipstick assay in urine and serum samples was 88.3% and 90.0%, while it was 90.8% and 93.3% for sandwich ELISA, respectively. The diagnostic indices of dipstick assay and ELISA either in serum or in urine were statistically comparable (P>0.05). In conclusion, the dipstick assay offers an alternative simple, rapid, non-invasive technique in detecting CSA or complement to stool examinations especially in field studies.
authors: Immunology Department, Theodor Bilharz Research Institute, 12411 Giza, Egypt.
authors: Zeinab
authors: Z
authors: Demerdash
authors: Salwa
authors: S
authors: Mohamed
authors: Mohamed
authors: M
authors: Hendawy
authors: Ibrahim
authors: I
authors: Rabia
authors: Mohy
authors: M
authors: Attia
authors: Zeinab
authors: Z
authors: Shaker
authors: Tarek M
authors: TM
authors: Diab
mesh_terms: D000818:Animals; D000909:Antibodies, Helminth / Q000302:isolation & purification; D000911:Antibodies, Monoclonal / Q000302:isolation & purification; D000947:Antigens, Helminth / Q000097:blood* / Q000652:urine*; D003955:Diagnostic Tests, Routine / Q000379:methods*; D006801:Humans; D007118:Immunoassay / Q000379:methods; D010274:Parasitology / Q000379:methods*; D019095:Point-of-Care Systems; D012550:Schistosoma mansoni / Q000276:immunology / Q000302:isolation & purification*; D012555:Schistosomiasis mansoni / Q000175:diagnosis*; D012680:Sensitivity and Specificity
chemical_list: D000909:Antibodies, Helminth; D000911:Antibodies, Monoclonal; D000947:Antigens, Helminth
keywords: Schistosoma mansoni; dipstick assay; monoclonal antibody; sandwich ELISA