Abstract
To detect IgG antibodies to Taenia solium, a controlled double-blind study was conducted using 91 coded cerebrospinal fluid samples from patients with neurocysticercosis (NCC) and other neurologic disorders. Samples were tested in an enzyme-linked immunosorbent assay (ELISA) using metacestode excretion/secretion antigens. The results were correlated with data from medical records on the diagnosis of NCC (based on computed tomography and magnetic resonance imaging criteria) and other neurologic disorders. The ELISA results were positive in 22 of the 24 cases with active NCC. In contrast, six cases with calcified cysts (inactive NCC), as well as one case in a transitional stage, were negative. One case with a calcified granuloma and another with a granuloma plus calcifications (classified as inactive NCC) had positive results. The remaining negative results corresponded to other neurologic disorders (58 cases). The results of the ELISA showed a significant difference between active and inactive NCC (P = 0.0034).
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