Five commercially available enzyme-linked immunosorbent assays (ELISAs), one in-house ELISA, and two hemagglutination assays were evaluated to determine their diagnostic accuracy for Chagas' disease in two studies. In study 1, ELISA kits showed 100% sensitivity, but specificities ranged from 82.84% to 100% when leishmaniasis cases were included and from 95.57% to 100% when leishmaniasis cases were excluded. Kits using recombinant antigens or synthetic peptides are more specific than those using crude extracts from Trypanosoma cruzi epimastigote forms. Kits evaluated in Panama, in study 2, showed 75% to 100% sensitivity and 97.12% to 100% specificity. These data were obtained by using a Western blot assay with T. cruzi trypomastigote excreted-secreted antigens as a reference test to confirm T. cruzi infection.
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http://dx.doi.org/10.1128/CVI.00127-07 | DOI Listing |
Front Parasitol
September 2024
Centro de Cálculo Científico de la Universidad de Los Andes (CeCalCULA), Universidad de Los Andes (ULA), Mérida, Venezuela.
Artemisinin-based treatments (ACTs) are the first therapy currently used to treat malaria produced by . However, in recent years, increasing evidence shows that some strains of are less susceptible to ACT in the Southeast Asian region. A data reanalysis of several omics approaches currently available about parasites of that have some degree of resistance to ACT was carried out.
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February 2024
National Reference Center for Parasitology, Research Institute of the McGill University Center, Montreal, QC, Canada.
The Polymerase Chain Reaction (PCR) test is a highly sensitive, specific, and rapid diagnostic tool for Chagas disease. Chagas disease is caused by the protozoan flagellate and is endemic to the Americas. While conventional serological methods are still used in the diagnosis of Chagas disease, they are being gradually replaced by molecular methods like PCR.
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September 2023
Laboratório de Parasitologia Médica (LIM-46), Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (FMUSP), São Paulo, Brazil.
Background: Evaluating the effectiveness of Chagas disease treatment poses challenges due to the lack of biomarkers for disease progression and therapeutic response. In this study, we aimed to assess the clearance of Trypanosoma cruzi ( parasites in a group of benznidazole (BNZ)-treated chronic Chagas disease patients using high-sensitivity quantitative PCR (qPCR) and track antibody levels through a semiquantitative chemiluminescent assay.
Methods: A total of 102 seropositive patients with previous PCR-positive results were enrolled in the study.
Front Parasitol
November 2023
Drugs for Neglected Diseases initiative, Latin America, Rio de Janeiro, Brazil.
infection is diagnosed by parasitological, molecular, and serological tests. Molecular methods based on DNA amplification provide a more sensitive alternative to classical parasitological techniques for detecting evidence of parasitemia, and are the preferred tests for congenital and oral transmission cases and parasite reactivation in chronically infected immunosuppressed individuals. In newborns at risk of vertical transmission, simplified diagnostic algorithms that provide timely results can reduce the high follow-up losses observed with current algorithms.
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January 2025
Hospital Veterinário Jerônimo Dix-Huit Rosado Maia, Universidade Federal Rural do Semi-Árido - UFERSA, Mossoró, RN, Brasil.
This study investigated infection by Leishmania spp., Leptospira spp., Toxoplasma gondii, and Trypanosoma cruzi in six-banded armadillos (Euphractus sexcinctus) from the semiarid region of northeastern Brazil.
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