Korean J Parasitol.  2013 Feb;51(1):93-98. 10.3347/kjp.2013.51.1.93.

Monoclonal Antibody-Based Dipstick Assay: A Reliable Field Applicable Technique for Diagnosis of Schistosoma mansoni Infection Using Human Serum and Urine Samples

• Demerdash
• Mohamed S
• Hendawy M
• Rabia I
• Attia M
• Shaker Z
• Diab TM

• KMID: 1501815
• DOI: http://doi.org/10.3347/kjp.2013.51.1.93

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.

Keyword

Schistosoma mansoni; monoclonal antibody; dipstick assay; sandwich ELISA

MeSH Terms

Animals
Antibodies, Helminth/diagnostic use/isolation & purification
Antibodies, Monoclonal/diagnostic use/isolation & purification
Antigens, Helminth/*blood/*urine
Diagnostic Tests, Routine/*methods
Humans
Immunoassay/methods
Parasitology/*methods
*Point-of-Care Systems
Schistosoma mansoni/immunology/*isolation & purification
Schistosomiasis mansoni/*diagnosis
Sensitivity and Specificity
Antibodies, Helminth
Antibodies, Monoclonal
Antigens, Helminth