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Please use this identifier to cite or link to this item: http://hdl.handle.net/10481/35301

Title: Comparative serology techniques for the diagnosis of Trypanosoma cruzi infection in a rural population from the state of Querétaro, Mexico
Authors: Villagrán-Herrera, Elena
Sánchez-Moreno, Manuel
Rodríguez-Méndez, Adriana Jheny
Hernández-Montiel, Hebert Luis
Dávila-Esquivel, Felipe de
González-Pérez, Germán
Martínez-Ibarra, José Alejandro
Diego-Cabrera, José Antonio
Issue Date: 2014
Abstract: Immunological diagnostic methods for Trypanosoma cruzi depend specifically on the presence of antibodies and parasitological methods lack sensitivity during the chronic and “indeterminate” stages of the disease. This study performed a serological survey of 1,033 subjects from 52 rural communities in 12 of the 18 municipalities in the state of Querétaro, Mexico. We detected anti-T. cruzi antibodies using the following tests: indirect haemagglutination assay (IHA), indirect immunofluorescence assay (IFA), ELISA and recombinant ELISA (rELISA). We also performed Western blot (WB) analysis using iron superoxide dismutase (FeSOD), a detoxifying enzyme excreted by the parasite, as the antigen. Positive test results were distributed as follows: ELISA 8%, rELISA 6.2%, IFA and IHA 5.4% in both cases and FeSOD 8%. A comparative study of the five tests was undertaken. Sensitivity levels, specificity, positive and negative predictive values, concordance percentage and kappa index were considered. Living with animals, trips to other communities, gender, age, type of housing and symptomatology at the time of the survey were statistically analysed using SPSS software v.11.5. Detection of the FeSOD enzyme that was secreted by the parasite and used as an antigenic fraction in WBs showed a 100% correlation with traditional ELISA tests.
Publisher: Fundação Oswaldo Cruz
Keywords: Trypanosoma cruzi
Iron superoxide dismutase (FeSOD)
Rural zones
Querétaro (México)
URI: http://hdl.handle.net/10481/35301
ISSN: 0074-0276
Rights : Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License
Citation: Villagrán-Herrera, E.; et al. Comparative serology techniques for the diagnosis of Trypanosoma cruzi infection in a rural population from the state of Querétaro, Mexico. Memórias do Instituto Oswaldo Cruz, 109(7): 967-972 (2014). [http://hdl.handle.net/10481/35301]
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