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Journal Article
Research Support, Non-U.S. Gov't
Evaluation of an antigen from Taenia crassiceps cysticercus for the serodiagnosis of neurocysticercosis.
Acta Tropica 2002 August
We report here the evaluation of an antigen from Taenia crassiceps cysticercus as a potential reagent in an enzyme-immunoelectrotransfer blotting assay (EITB) and an enzyme-linked immunosorbent assay (ELISA) for the serodiagnosis of neurocysticercosis (NC) using clinical specimens obtained from patients in different phases of the disease. Serum and cerebrospinal fluid (CSF) samples from 64 patients suspected of having NC according to clinical manifestation and brain computed tomography were tested by ELISA with Taenia solium total saline antigen (ELISA-Tso) and by immunoblotting with T. crassiceps glycoproteins antigen (EITB-gpTcra). Forty-five serum samples were also tested immunoblotting with T. solium glycoproteins antigen (EITB-gpTso) and 30 were tested by ELISA with T. crassiceps 14 kDa glycoprotein (ELISA-gp14Tcra). Serum samples from apparently healthy individuals without any parasitic disease and from patients with other parasitic diseases were included as controls. The results of ELISA-Tso analysis with CSF obtained from 64 patients with NC showed that 53 (83%) were reactive. EITB-gpTcra analysis with serum from the same group of patients showed a sensitivity of 91%. Results of EITB-gpTso and EITB-gpTcra analysis with serum samples demonstrated an agreement of 100% between both tests. ELISA-gp14Tcra was positive in 23 (77%) sera, 22 with paired CSF positive. When ELISA-gp14Tcra results were compared to EITB-Tso results, a relative sensitivity of 95% was observed. All serum samples from the control group were negative in ELISA-gp14Tcra and only one serum from an individual with Taenia saginata was reactive in this assay, showing a specificity of 99% for ELISA-gp14Tcra. This fraction was purified in only one step with a good yield for use in immunoassays. We suggest that the gp14Tcra antigen can be used for detecting anti-cysticercus antibodies in serum samples for epidemiological investigation purposes and also for diagnostic screening of NC patients.
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