ArticlePLoS neglected tropical diseases2022
Correlation of TcII discrete typing units with severe chronic Chagas cardiomyopathy in patients from various Brazilian geographic regions.
Article in PLoS neglected tropical diseases, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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9 citing papers in PubMed, 15 citations in OpenAlex.
- Long-Term Parasitological Clearance and Cardiac Progression inTropical medicine and infectious disease · 2026Article
- Genetic diversity of Trypanosoma cruzi in individuals with chronic Chagas disease in the Northern Minas Gerais and Vale do Jequitinhonha regions, Minas Gerais, Brazil.PLoS neglected tropical diseases · 2025Article
- Molecular Characterization ofInsects · 2025Article
- Home invasion of triatomines (Hemiptera: Reduviidae) in the urban area of Mato Grosso, Brazil.Revista da Sociedade Brasileira de Medicina Tropical · 2025Article
- Cardiac involvement in Chagas disease and African trypanosomiasis.Nature reviews. Cardiology · 2024Review
- The epidemiology of Chagas disease in the Americas.Lancet regional health. Americas · 2024Review
- Clinical features of Chagas disease progression and severity.Lancet regional health. Americas · 2024Review
- Fifteen Years after the Definition ofLife (Basel, Switzerland) · 2023Review
- Differential cardiomyocyte transcriptomic remodeling during in vitro Trypanosoma cruzi infection using laboratory strains provides implications on pathogenic host responses.Tropical medicine and health · 2023Article
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8 authors at 1 institution in 1 country.
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Abstract
backgroundChagas disease (ChD) is caused by Trypanosoma cruzi. The genetic structure of the species is divided into seven distinct genetic groups, TcI to TcVI, and Tcbat, which have shown differences in terms of geographic distribution, biological properties, and susceptibility to drugs. However, the association between genetic variability and clinical forms of ChD has not yet been fully elucidated. The predominance of TcII and TcVI discrete typing units (DTUs) (genetic groups) is known to occur in several Brazilian regions and is associated with both the domestic and the wild cycles of ChD. Thus, this study aimed to verify the genotypes of the parasites present in 330 patients with chronic Chagas cardiomyopathy (CCC) from different Brazilian states attended at the Clinical Hospital of the Ribeirão Preto Medical School and to assess the existence of a correlation between the clinical forms with the main cardiovascular risk factors and the genetics of the parasite. METHODOLOGY PRINCIPAL
findingsAll patients with CCC were clinically evaluated through anamnesis, physical examination, biochemical tests, 12-lead electrocardiogram, echocardiogram and chest X-ray. Peripheral blood (5 mL) was collected in guanidine/ethylenediaminetetraacetic acid from each patient for DNA extraction and real-time polymerase chain reaction (PCR) for Chagas disease and genotyping of the parasite in the 7 DTUs. Parasite genotyping was performed using conventional multilocus PCR. Samples of only 175 patients were positive after amplification of the specific genes contained in the T. cruzi genotyping criteria. TcII (64/175), TcVI (9/175), and TcI (3/175) DTUs were predominant, followed by TcII/TcV/TcVI (74/175), and TcII/TcVI (23/175). The TcIII and TcIV DTU´s was detected in only one sample of CCC patients. CONCLUSIONS/SIGNIFICANCE: Our data corroborate previous findings, indicating the predominance of the TcII genotype in patients with CCC of Brazilian origin. Moreover, this study pioneered disclosing a direct correlation between the TcII DTU and severe CCC.
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