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Trypanosoma cruzi-specific immune responses in subjects from endemic areas of Chagas disease of Argentina. 2010
Gabriela C Olivera, and
Maria C Albareda, and
Maria G Alvarez, and
Ana M De Rissio, and
Laura E Fichera, and
Gretchen Cooley, and
Pedro Yachelini, and
Hugo A Hrellac, and
Hilda Riboldi, and
Susana A Laucella, and
Rick L Tarleton, and
Miriam Postan
Instituto Nacional de Parasitología Dr. Mario Fatala Chaben, Av. Paseo Colón 568, Buenos Aires 1063, Argentina.
Trypanosoma cruzi-specific immune responses were evaluated in a total of 88 subjects living in areas endemic of Chagas disease of Argentina by IFN-gamma ELISPOT assays and immunoblotting. Positive T. cruzi antigen-induced IFN-gamma responses were detected in 42% of subjects evaluated (15/26 positive by conventional serology and 22/62 seronegative subjects). Using immunoblotting, T. cruzi-specific IgG reactivity was detected in all seropositive subjects and in 11% (7/61) of subjects negative by conventional serology. Measurements of T cell responses and antibodies by immunoblotting, in conjunction with conventional serology, might enhance the capability of detection of exposure to T. cruzi in endemic areas.
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