Analysis of the seroprevalence of and factors associated with Chagas disease in an endemic area in Northeastern Brazil

This study aimed to identify the seroprevalence of and the possible factors associated with CD in inhabitants of the City of Limoeiro do Norte, Northeastern Brazil. METHODS: Between April and November 2013, blood collection was conducted and a semi-structured questionnaire was administered. Blood samples that showed positive or possible serology for anti-Trypanosoma cruzi antibodies based on indirect immunofluorescence, hemagglutination indirect, and an enzyme-linked immunosorbent assay were analyzed. Associations between CD positivity and the study variables were analyzed using prevalence ratios (PR) with 95% confidence intervals (CI). RESULTS: A total of 812 individuals were analyzed, of which T. cruzi seropositivity was determined in 4.2% (34 individuals). Sociodemographic variables showing a significant association with T. cruzi positivity included age>50 years (PR = 27.6; 95% CI = 6.66-114.4), elementary level education (PR = 5.15; 95% CI = 1.83-14.47), and retirement (PR = 7.25; 95% CI = 3.72-14.14). Positivity for T. cruzi was 6.17 times higher in those who had a history of living in rammed earth houses compared with those who did not (95% CI = 2.19-17.37). There was no evidence of vertical transmission in the individuals studied. Among the individuals infected with T. cruzi, the majority reported having a comorbidity (p
Source: Revista da Sociedade Brasileira de Medicina Tropical - Category: Tropical Medicine Source Type: research

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Background: American trypanosomiasis or Chagas disease represents a major health problem and continues to be endemic in large areas of Latin America. The causal agent of this emergent parasitic infectious disease is Trypanosoma cruzi. At present, the amount of infected people worldwide projected the World Health Organization sums to 8 –10 million. T. cruzi contains a major antigen, cruzipain (Cz), with an unusual C-terminal extention (C-T), retained in the mature protein. C-T bears a number of post translational modifications and is responsible for the immunogenicity of the molecule.
Source: International Journal of Infectious Diseases - Category: Infectious Diseases Authors: Tags: 0533 Source Type: research
Chagas disease (CD), caused by the parasite Trypanosoma cruzi, is endemic to parts of Mexico and Central/South America. Chagas heart disease develops in 20-30% of patients; manifestations include conduction abnormalities (e.g. right bundle branch block [RBBB]), ventricular tachycardia (VT), and progressive dilated cardiomyopathy1. The estimated prevalence of CD in the US exceeds 300,000 people2, and CD accounts for ∼19% of non-ischemic cardiomyopathy3, 7.5% of pacemakers4, and 5% of conduction abnormalities5 among Latin American immigrants in California.
Source: Journal of Cardiac Failure - Category: Cardiology Authors: Tags: Research Letter Source Type: research
Abstract Autoantibodies against muscarinic and beta1-adrenergic receptors are considered a potential cause and/or risk factor for chronic heart failure. Association of periodontitis with such autoantibodies and with impaired heart function has been observed in patients exposed to endemic Chagas' disease, which triggers by itself cardiomyopathy and receptor immunization.Here we studied the association between periodontitis, markers of cardiac injury and receptor autoimmunization in periodontitis patients (n = 147) not exposed to Chagas' disease. The autoantibodies were determined by IgG binding to native intact mus...
Source: Aging - Category: Biomedical Science Authors: Tags: Aging (Albany NY) Source Type: research
CONCLUSIONS The results reinforce the recommendation that these standards be considered for performance evaluations of commercialised immunoassays and should be an integral step in the development of new test components or assay paradigms. PMID: 32725060 [PubMed - as supplied by publisher]
Source: Memorias do Instituto Oswaldo Cruz - Category: Infectious Diseases Authors: Tags: Mem Inst Oswaldo Cruz Source Type: research
rra C Abstract Chagas disease is emerging in countries to which it is not endemic. Biomarkers for earlier therapeutic response assessment in patients with chronic Chagas disease are needed. We profiled plasma-derived extracellular vesicles from a heart transplant patient with chronic Chagas disease and showed the potential of this approach for discovering such biomarkers. PMID: 32687028 [PubMed - in process]
Source: Emerging Infectious Diseases - Category: Infectious Diseases Authors: Tags: Emerg Infect Dis Source Type: research
H, Lopez-Sendon J Abstract Chagas disease is an emerging infectious disease in Europe and other non-endemic areas, mainly owing to migration from endemic areas. We aimed at investigating the value of advanced echocardiography (ECHO) and cardiac magnetic resonance (CMR) in patients newly diagnosed with Chagas disease to compare findings with those of ECG and conventional ECHO and thus detecting cardiac abnormalities. We included consecutive patients with newly diagnosed Chagas disease and registered cardiac test results (ECG, ECHO, and CMR). We divided ECHO parameters into three tiers: 1) left ventricular ejection ...
Source: The American Journal of Tropical Medicine and Hygiene - Category: Tropical Medicine Authors: Tags: Am J Trop Med Hyg Source Type: research
CONCLUSION: These results suggest that the double or triple infection is a phenomenon existing in almost all the coendemics areas and mammals studied, which might influence the mechanisms of adaptation and pathogenicity of these parasites. PMID: 32655075 [PubMed - in process]
Source: Journal of Vector Borne Diseases - Category: Infectious Diseases Tags: J Vector Borne Dis Source Type: research
Publication date: Available online 12 July 2020Source: Preventive Veterinary MedicineAuthor(s): Jeiczon Jaimes-Dueñez, Ángela Patricia Jiménez-Leaño, Maria Esteban-Mendoza, Lucas Andres Moreno-Salcedo, Omar Triana-Chávez, Omar Cantillo-Barraza
Source: Preventive Veterinary Medicine - Category: Veterinary Research Source Type: research
Conclusions: Our data show that novel polymorphisms affecting IL12B and IL10, but not IFNG or IL4 genes play a role in genetic susceptibility to CCC development. This might indicate that the increased Th1 differentiation and IFN-γ production associated with CCC is genetically controlled.
Source: Frontiers in Immunology - Category: Allergy & Immunology Source Type: research
This study aimed to develop and validate a simple method for predicting long ‐term all‐cause mortality in ambulatory patients with chronic heart failure (CHF) residing in an area where Chagas disease is endemic, which will be important not only for patients living in Latin America but also to those living in developed non‐endemic countries.Methods and resultsA total of 677 patients with a wide spectrum of aetiologies for left ventricular systolic dysfunction and receiving optimized evidence ‐based treatment for CHF were prospectively followed for approximately 11 years. We established a risk score using Cox pr...
Source: ESC Heart Failure - Category: Cardiology Authors: Tags: Original Research Article Source Type: research
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