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  • Title: Assessment of antigenic fractions of varying hydrophobicity from Taenia solium metacestodes for the diagnosis of human neurocysticercosis.
    Author: Machado GA, Santiago FM, Mineo JR, Costa-Cruz JM.
    Journal: Trop Med Int Health; 2007 Nov; 12(11):1369-76. PubMed ID: 17949403.
    Abstract:
    OBJECTIVE: To evaluate the detergent and aqueous phases of crude saline extract (crude) of Taenia solium metacestodes extracted with Triton X-114, for the detection of immunoglobulin G (IgG) antibodies by enzyme-linked immunosorbent assay (ELISA) and immunoblot for the laboratory diagnosis of human neurocysticercosis. METHOD: Serum samples were collected from 138 individuals and tested; 40 were diagnosed with neurocysticercosis (NC; group 1), 58 presented other parasitic diseases (group 2) and 40 were apparently healthy (group 3). RESULTS: The detergent phase showed only one dominant component (70-50 kDa), while the aqueous phase showed four (116, 110, 97 and 77 kDa) by silver staining. ELISA sensitivity and specificity were 92.5% and 84.5% for crude phase, 92.5% and 93.3% for detergent phase and 72.5% and 72.6% for aqueous phase. CONCLUSIONS: The immunoblot of the antigens confirmed the results obtained by ELISA. Detergent phase purified from T. solium metacestodes was an important source of specific peptides and was efficient in detecting T. solium metacestodes antibodies in serum samples. This phase can be used for detecting IgG antibodies to T. solium metacestodes in seroepidemiological investigations and in the diagnostic screening of NC patients.
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