. To determine the diagnostic yield using western blotting to simultaneously detect
antibodies in patients with human
cysticercosis,
hydatidosis, and human
fascioliasis. Materials and methods . Cross-sectional study of diagnostic yield assessment. Excretory/secretory
antigens were obtained from Taenia solium larvae, Echinococcus granulosus
cysts, and the adult flukes of Fasciola hepática, which were then separated using the
polyacrylamide gel electrophoresis technique, transferred, and attached to a
nitrocellulose membrane to be probed with sera from the patient infected with the three parasites. The sensitivity of the technique was assessed using 300 individual serum samples, 60 pools of two parasites, and 20 pools of three parasites with 75 sera from patients with other parasites, 10 from patients with other diseases, and 15 from patients without parasites. Results . The technique revealed 13
glycoproteins (GP): GP 35, 31, 24, 23, 18, 17, 14, and 13 kDa for
cysticercosis; GP 8, 16, and 21 kDa for
hydatidosis; and GP 17 and 23 kDa for
fascioliasis. The test detected the presence of
antibodies with a sensitivity of 96% (95% confidence interval [CI] = 94.62-98.54%) in the detection of one or the thirteen bands, a specificity of 100% (95% CI = 99.50-100.00%); individually, there was a sensitivity for
cysticercosis of 97% (95% CI = 93.16-100.00%), for
hydatidosis of 94% (95% CI = 88.85-99.15%) and for
fascioliasis of 96% (95% CI = 91.66-100.00%). Conclusions . Western blotting is effective in the simultaneous detection of
antibodies in patients with human
cysticercosis,
hydatidosis, and
fascioliasis, and it can be used as a diagnostic test to either rule out or confirm the presence of
antibodies in endemic areas.