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In this chapter, the main prognostic markers of Chagas heart disease are addressed, with an emphasis on the most recent findings and questions, establishing the basis for a broad discussion of recommendations and new approaches to managing Chagas cardiopathy. The main biological and genetic markers and the contribution of the electrocardiogram, echocardiogram and cardiac magnetic resonance are presented. We also discuss the most recent therapeutic proposals for heart failure, thromboembolism and arrhythmias, as well as current experience in heart transplantation in patients suffering from severe Chagas cardiomyopathy. The clinical and epidemiological challenges introduced by acute Chagas disease due to oral contamination are discussed. In addition, we highlight the importance of ageing and comorbidities in influencing the outcome of chronic Chagas heart disease. Finally, we discuss the importance of public policies, the vital role of funding agencies, universities, the scientific community and health professionals, and the application of new technologies in finding solutions for better management of Chagas heart disease. chapter addressed questions cardiopathy electrocardiogram presented failure arrhythmias cardiomyopathy discussed addition Finally policies agencies universities professionals

https://doi.org/10.1590/0074-02760210172

Covid-19: e-Learning as a tool for improving the knowledge
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Melo, Maria do Carmo Barros de

; Tupinambás, Unaí

; Ferri, Priscila Menezes

; Godoy, Solange Cervinho Bicalho

; Torres, Rosália Morais

; Palmeira, Vitória Andrade

; Rocha, Gabriel

; Reis, Zilma Silveira Nogueira

Revista Brasileira de Educação Médica

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2021, Volume 45 N. 3 elocation e181

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo: Introdução: A prevenção e o combate da Covid-19 são de extrema importância. Nesse contexto, a importância do uso de ferramentas de telemedicina tem crescido, incluindo teleconsultas, telemonitoramento epidemiológico, diagnóstico remoto, suporte e treinamento de profissionais de saúde. Objetivo: Este trabalho tem como objetivo relatar os resultados de um curso de treinamento a distância que abordou aspectos relacionados ao Sars-CoV-2 e à Covid-19. Método: Analisaram-se os seguintes aspectos: adesão ao curso, perfil dos alunos, índice de proficiência pré e pós-teste e satisfação com o curso.Trata-se de um estudo transversal que avaliou os dados do curso sobre o Sars-CoV-2 e a Covid-19. Os dados foram analisados em termos de distribuição e comparação de médias e frequências. Um teste t pareado foi usado para comparar as notas do pré e do pós-teste. O valor de p < 0,05 foi considerado significativo.Coletaram-se os dados na plataforma de ensino Moodle, sem identificação dos participantes. Resultado: De 23 de março a 14 de maio de 2020, o curso foi oferecido a 1.008 estudantes de Medicina e profissionais de saúde. A maioria era de Minas Gerais, alguns de outros estados brasileiros e de Moçambique. A maioria concluiu o curso com 89,8% de adesão. As avaliações referentes ao curso, aos tutores, ao grau de satisfação e à segurança para o desempenho profissional após o curso obtiveram pontuação máxima. A comparação entre as séries pré e pós-teste mostrou ganho de proficiência (p < 0,0001). Conclusão: O curso tem contribuído para a formação de estudantes de Medicina e profissionais de saúde do Brasil e de Moçambique. A comissão organizadora conseguiu capacitar alunos e profissionais de saúde com dificuldade de acesso a boas informações técnicas e baseadas em evidências. Após a capacitação, os alunos foram selecionados para atuar em projetos universitários com o objetivo de apoiar prefeituras, secretarias de saúde e comunidade.

Abstract: Introduction: Preventing and fighting COVID-19 are of the utmost importance. In this context, the importance of using telemedicine tools has grown, including teleconsultations, epidemiological telemonitoring, remote diagnosis, support, and training of health professionals. Objective: This article aims to report the results of a distance-training course on SARS-CoV-2 and COVID-19. We analyze the course adherence, the students’ profile, pre, and post-test proficiency index and satisfaction with the course. Methods: This is a cross-sectional study that evaluated data from the course on SARS-CoV-2 and COVID-19. The data were analyzed in terms of distribution and comparisons of means and frequencies. A paired t-test was used to compare the pre and post-test grades. A p-value <0.05 was considered significant. Data were collected from the Moodle teaching platform, without identifying the participants. Results: From March 23 to May 14, the course was offered to 1,008 medical students and health care providers. Most were from the state of Minas Gerais, some from other Brazilian states, and Mozambique. The majority completed the course, with an 89.8% adherence. The evaluations related to the course, the tutors, the degree of satisfaction, and the security for the professional performance after the course obtained maximum scores. The comparison between the pre and post grades showed proficiency gain (p<0.0001). Conclusion: The course has contributed to the training of medical students and health professionals from Brazil and Mozambique. The organizing committee was able to prepare students and provide knowledge to professionals with difficulty to access good technical and evidence-based information. After the training, the students were selected to work on university projects aiming at supporting city halls, health departments, and the community.

https://doi.org/10.1590/1981-5271v45.3-20200434.ing 154 downloads

2 nd Brazilian Consensus on Chagas Disease, 2015
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Dias, João Carlos Pinto

; Ramos Jr., Alberto Novaes

; Gontijo, Eliane Dias

; Luquetti, Alejandro

; Shikanai-Yasuda, Maria Aparecida

; Coura, José Rodrigues

; Torres, Rosália Morais

; Melo, José Renan da Cunha

; Almeida, Eros Antonio de

; Oliveira Jr., Wilson de

; Silveira, Antônio Carlos

; Rezende, Joffre Marcondes de

; Pinto, Fabiane Scalabrini

; Ferreira, Antonio Walter

; Rassi, Anis

; Fragata Filho, Abílio Augusto

; Sousa, Andréa Silvestre de

; Correia, Dalmo

; Jansen, Ana Maria

; Andrade, Glaucia Manzan Queiroz

; Britto, Constança Felícia De Paoli de Carvalho

; Pinto, Ana Yecê das Neves

; Rassi Jr., Anis

; Campos, Dayse Elisabeth

; Abad-Franch, Fernando

; Santos, Silvana Eloi

; Chiari, Egler

; Hasslocher-Moreno, Alejandro Marcel

; Moreira, Eliane Furtado

; Marques, Divina Seila de Oliveira

; Silva, Eliane Lages

; Marin-Neto, José Antonio

; Galvão, Lúcia Maria da Cunha

; Xavier, Sergio Salles

; Valente, Sebastião Aldo da Silva

; Carvalho, Noêmia Barbosa

; Cardoso, Alessandra Viana

; Silva, Rafaella Albuquerque e

; Costa, Veruska Maia da

; Vivaldini, Simone Monzani

; Oliveira, Suelene Mamede

; Valente, Vera da Costa

; Lima, Mayara Maia

; Alves, Renato Vieira

Revista da Sociedade Brasileira de Medicina Tropical

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dec 2016, Volume 49 Suppl. 1 Pages 3 - 60

Abstract: En | Text: En | PDF: En

Abstract Chagas disease is a neglected chronic condition with a high burden of morbidity and mortality. It has considerable psychological, social, and economic impacts. The disease represents a significant public health issue in Brazil, with different regional patterns. This document presents the evidence that resulted in the Brazilian Consensus on Chagas Disease. The objective was to review and standardize strategies for diagnosis, treatment, prevention, and control of Chagas disease in the country, based on the available scientific evidence. The consensus is based on the articulation and strategic contribution of renowned Brazilian experts with knowledge and experience on various aspects of the disease. It is the result of a close collaboration between the Brazilian Society of Tropical Medicine and the Ministry of Health. It is hoped that this document will strengthen the development of integrated actions against Chagas disease in the country, focusing on epidemiology, management, comprehensive care (including families and communities), communication, information, education, and research .

https://doi.org/10.1590/0037-8682-0505-2016 9267 downloads

II Consenso Brasileiro em Doença de Chagas, 2015
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Dias, João Carlos Pinto

; Ramos Jr., Alberto Novaes

; Gontijo, Eliane Dias

; Luquetti, Alejandro

; Shikanai-Yasuda, Maria Aparecida

; Coura, José Rodrigues

; Torres, Rosália Morais

; Melo, José Renan da Cunha

; Almeida, Eros Antonio de

; Oliveira Jr., Wilson de

; Silveira, Antônio Carlos

; Rezende, Joffre Marcondes de

; Pinto, Fabiane Scalabrini

; Ferreira, Antonio Walter

; Rassi, Anis

; Fragata Filho, Abílio Augusto

; Sousa, Andréa Silvestre de

; Correia Filho, Dalmo

; Jansen, Ana Maria

; Andrade, Glaucia Manzan Queiroz

; Britto, Constança Felícia De Paoli de Carvalho

; Pinto, Ana Yecê das Neves

; Rassi Jr., Anis

; Campos, Dayse Elisabeth

; Abad-Franch, Fernando

; Santos, Silvana Eloi

; Chiari, Egler

; Hasslocher-Moreno, Alejandro Marcel

; Moreira, Eliane Furtado

; Marques, Divina Seila de Oliveira

; Silva, Eliane Lages

; Marin-Neto, José Antonio

; Galvão, Lúcia Maria da Cunha

; Xavier, Sergio Salles

; Valente, Sebastião Aldo da Silva

; Carvalho, Noêmia Barbosa

; Cardoso, Alessandra Viana

; Silva, Rafaella Albuquerque e

; Costa, Veruska Maia da

; Vivaldini, Simone Monzani

; Oliveira, Suelene Mamede

; Valente, Vera da Costa

; Lima, Mayara Maia

; Alves, Renato Vieira

Epidemiologia e Serviços de Saúde

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jun 2016, Volume 25 N. spe. Pages 7 - 86

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO A doença de Chagas é uma condição crônica negligenciada com elevada carga de morbimortalidade e impacto dos pontos de vista psicológico, social e econômico. Representa um importante problema de saúde pública no Brasil, com diferentes cenários regionais. Este documento traduz a sistematização das evidências que compõe o Consenso Brasileiro de Doença de Chagas. O objetivo foi sistematizar estratégias de diagnóstico, tratamento, prevenção e controle da doença de Chagas no país, de modo a refletir as evidências científicas disponíveis. Sua construção fundamentou-se na articulação e contribuição estratégica de especialistas brasileiros com conhecimento, experiência e atualização sobre diferentes aspectos da doença. Representa o resultado da estreita colaboração entre a Sociedade Brasileira de Medicina Tropical e o Ministério da Saúde. Espera-se com este documento fortalecer o desenvolvimento de ações integradas para enfrentamento da doença no país com foco em epidemiologia, gestão, atenção integral (incluindo famílias e comunidades), comunicação, informação, educação e pesquisas.

ABSTRACT Chagas disease is a neglected chronic condition that presents high morbidity and mortality burden, with considerable psychological, social, and economic impact. The disease represents a significant public health issue in Brazil, with different regional patterns. This document presents the evidence that resulted in the Brazilian Consensus on Chagas Disease. The objective was to review and standardize strategies for diagnosis, treatment, prevention, and control of Chagas disease in the country, based on the available scientific evidence. The consensus is based on collaboration and contribution of renowned Brazilian experts with vast knowledge and experience on various aspects of the disease. It is the result of close collaboration between the Brazilian Society of Tropical Medicine and the Ministry of Health. This document shall strengthen the development of integrated control measures against Chagas disease in the country, focusing on epidemiology, management, comprehensive care (including families and communities), communication, information, education, and research.

https://doi.org/10.5123/S1679-49742016000500002 3725 downloads

II Consenso Brasileiro em Doença de Chagas, 2015
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Dias, João Carlos Pinto

; Ramos Jr., Alberto Novaes

; Gontijo, Eliane Dias

; Luquetti, Alejandro

; Shikanai-Yasuda, Maria Aparecida

; Coura, José Rodrigues

; Torres, Rosália Morais

; Melo, José Renan da Cunha

; Almeida, Eros Antonio de

; Oliveira Jr., Wilson de

; Silveira, Antônio Carlos

; Rezende, Joffre Marcondes de

; Pinto, Fabiane Scalabrini

; Ferreira, Antonio Walter

; Rassi, Anis

; Fragata Filho, Abílio Augusto

; Sousa, Andréa Silvestre de

; Correia Filho, Dalmo

; Jansen, Ana Maria

; Andrade, Glaucia Manzan Queiroz

; Britto, Constança Felícia De Paoli de Carvalho

; Pinto, Ana Yecê das Neves

; Rassi Jr., Anis

; Campos, Dayse Elisabeth

; Abad-Franch, Fernando

; Santos, Silvana Eloi

; Chiari, Egler

; Hasslocher-Moreno, Alejandro Marcel

; Moreira, Eliane Furtado

; Marques, Divina Seila de Oliveira

; Silva, Eliane Lages

; Marin-Neto, José Antonio

; Galvão, Lúcia Maria da Cunha

; Xavier, Sergio Salles

; Valente, Sebastião Aldo da Silva

; Carvalho, Noêmia Barbosa

; Cardoso, Alessandra Viana

; Silva, Rafaella Albuquerque e

; Costa, Veruska Maia da

; Vivaldini, Simone Monzani

; Oliveira, Suelene Mamede

; Valente, Vera da Costa

; Lima, Mayara Maia

; Alves, Renato Vieira

Epidemiologia e Serviços de Saúde

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jun 2016, Volume 25 N. spe Pages 7 - 86

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

https://doi.org/10.5123/s1679-49742016000500002 63592 downloads

Prevalence of Rheumatic Heart Disease in a Public School of Belo Horizonte
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Miranda, Lavinia Pimentel

; Camargos, Paulo Augusto Moreira

; Torres, Rosália Morais

; Meira, Zilda Maria Alves

Arquivos Brasileiros de Cardiologia

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aug 2014, Volume 103 N. 2 Pages 89 - 97

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Fundamento: Estudos indicam que o Doppler ecocardiograma possibilita a identificação de um maior número de casos de valvopatia reumática, quando comparado ao exame clínico, em indivíduos aparentemente saudáveis. Objetivos: Determinar a prevalência de valvopatia sugestiva de envolvimento reumático segundo as avaliações clínicas e Doppler ecardiográficas em alunos de escola pública de Belo Horizonte. Métodos: Estudo transversal realizado com 267 escolares entre 6 e 16 anos, selecionados de forma aleatória. Os alunos foram submetidos à anamnese e exame físico com o objetivo de estabelecer critérios prévios para o diagnóstico de febre reumática. Todos realizaram o estudo Doppler ecocardiográfico com o emprego de um aparelho portátil. Aqueles que apresentaram regurgitação valvar mitral (RM) e ou aórtica (RAo) sugestiva de não fisiológica foram encaminhados ao laboratório de Doppler ecocardiografia do Hospital das Clínicas da Universidade Federal de Minas Gerais (HC-UFMG) para a realização de novo estudo. Conforme os achados, os casos de valvopatia reumática foram classificados em definitiva, provável e possível. Resultados: Dos 267 escolares, um (0,37%) apresentou história compatível com o diagnóstico de febre reumática aguda (FRA), 25 (9,4%) apresentaram RM e/ou RAo consideradas não fisiológicas ao Doppler ecocardiograma portátil. Destes, 16 (6%) realizaram Doppler ecocardiograma no HC-UFMG, sendo evidenciadas: valvopatia reumática definitiva em um escolar; valvopatia reumática provável em três; valvopatia reumática possível em um escolar. Conclusão: Na população estudada a prevalência de casos compatíveis com envolvimento reumático foi cinco vezes maior ao Doppler ecocardiograma (18,7/1000 - IC 95%, 6,9/1000 - 41,0/1000) em relação à avaliação clínica (3,7/1000 - IC 95%).

Background: Previous studies indicate that compared with physical examination, Doppler echocardiography identifies a larger number of cases of rheumatic heart disease in apparently healthy individuals. Objectives: To determine the prevalence of rheumatic heart disease among students in a public school of Belo Horizonte by clinical evaluation and Doppler echocardiography. Methods: This was a cross-sectional study conducted with 267 randomly selected school students aged between 6 and 16 years. students underwent anamnesis and physical examination with the purpose of establishing criteria for the diagnosis of rheumatic fever. They were all subjected to Doppler echocardiography using a portable machine. Those who exhibited nonphysiological mitral regurgitation (MR) and/or aortic regurgitation (AR) were referred to the Doppler echocardiography laboratory of the Hospital das Clínicas of the Universidade Federal of Minas Gerais (HC-UFMG) to undergo a second Doppler echocardiography examination. According to the findings, the cases of rheumatic heart disease were classified as definitive, probable, or possible. Results: Of the 267 students, 1 (0.37%) had a clinical history compatible with the diagnosis of acute rheumatic fever (ARF) and portable Doppler echocardiography indicated nonphysiological MR and/or AR in 25 (9.4%). Of these, 16 (6%) underwent Doppler echocardiography at HC-UFMG. The results showed definitive rheumatic heart disease in 1 student, probable rheumatic heart disease in 3 students, and possible rheumatic heart disease in 1 student. Conclusion: In the population under study, the prevalence of cases compatible with rheumatic involvement was 5 times higher on Doppler echocardiography (18.7/1000; 95% CI 6.9/1000-41.0/1000) than on clinical evaluation (3.7/1000-95% CI).

https://doi.org/10.5935/abc.20140116 4761 downloads Cited 2 times in SciELO

A serological, parasitological and clinical evaluation of untreated Chagas disease patients and those treated with benznidazole before and thirteen years after intervention
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Machado-de-Assis, Girley Francisco

; Diniz, Glaucia Alessio

; Montoya, Roberto Araújo

; Dias, João Carlos Pinto

; Coura, José Rodrigues

; Machado-Coelho, George Luiz Lins

; Albajar-Viñas, Pedro

; Torres, Rosália Morais

; Lana, Marta de

Memórias do Instituto Oswaldo Cruz

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nov 2013, Volume 108 N. 7 Pages 873 - 880

Abstract: En | Text: En | PDF: En

The etiological treatment of Chagas disease is recommended for all patients with acute or recent chronic infection, but controversies remain regarding the benefit of chemotherapy and interpretations of the parasitological cure after etiological treatment. This study compares the laboratory and clinical evaluations of Chagas disease patients who were diagnosed 13 years earlier. Fifty-eight Chagas disease patients (29 treated with benznidazole and 29 untreated) were matched at the time of treatment based on several variables. Conventional serology revealed the absence of seroconversion in all patients. However, lower serological titres were verified in the treated group, primarily among patients who had the indeterminate form of the disease. Haemoculture performed 13 years after the intervention was positive for 6.9% and 27.6% of the treated and untreated patients, respectively. Polymerase chain reaction tests were positive for 44.8% and 13.8% of the treated and untreated patients, respectively. Patients who presented with the indeterminate form of the disease at the beginning of the study exhibited less clinical progression (17.4%) compared with the untreated group (56.5%). Therefore, this global analysis revealed that etiological treatment with benznidazole may benefit patients with respect to the clinical progression of Chagas disease and the prognosis, particularly when administered to patients with the indeterminate form of the disease.

https://doi.org/10.1590/0074-0276130122 1930 downloads

Dispersão da onda P e índice de volume do átrio esquerdo como preditores na insuficiência cardíaca
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Silva, Rose Mary Ferreira Lisboa da

; Kazzaz, Nadya Mendes

; Torres, Rosália Morais

; Moreira, Maria da Consolação Vieira

Arquivos Brasileiros de Cardiologia

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jan 2013, Volume 100 N. 1 Pages 67 - 74

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

FUNDAMENTO: Estudos demonstram que a dispersão da onda P (DP) e o índice de volume do átrio esquerdo (Aesc) são preditores de eventos cardiovasculares (EC). OBJETIVO: Verificar o valor prognóstico da dispersão da onda P e do Aesc para a ocorrência de EC em pacientes com insuficiência cardíaca. MÉTODOS: Estudo longitudinal e prospectivo com 78 pacientes consecutivos com idade média de 47,2 anos, sendo 52 homens, estáveis com insuficiência cardíaca, submetidos à avaliação clínica, aos exames de eletrocardiograma e ao ecocardiograma, com seguimento de 26,5 meses. RESULTADOS: As médias das variáveis foram: 50 ms DP e 35,5 ml/m² Aesc. Considerando-se DP > 40 ms e como referência Aesc > 28 ml/m², o valor preditivo positivo da DP foi de 87,5% e o negativo de 76,9%. Durante o seguimento, 21 pacientes apresentaram EC. Houve associação entre as medidas do átrio esquerdo, os volumes do ventrículo esquerdo e a fração de ejeção e EC. Não houve associação entre a DP e EC. Pela análise multivariada, o átrio esquerdo e o Aesc foram preditores de eventos (p = 0,00 e 0,02). Pela curva de operação característica para a variável estável EC, foram obtidas as áreas de 0,80 e 0,69 para Aesc (p = 0,00) e Aesc > 28 ml/m² (p = 0,01). As curvas de sobrevida (Kaplan-Meier) livre daqueles eventos para Aesc > 28 ml/m² e para a etiologia chagásica demonstraram razão de chance de 14,4 (p = 0,00) e de 3,2 (p = 0,03). Não houve diferença de evolução entre pacientes com insuficiência cardíaca isquêmica e não isquêmica. CONCLUSÃO: DP não esteve correlacionada a EC. Aesc foi um preditor independente de EC e os chagásicos apresentaram pior evolução.

BACKGROUND: Studies have shown that P-wave dispersion (PWD) and left atrial volume index (LAVi) are predictors of cardiovascular events (CE). OBJECTIVE: To verify the prognostic value of PWD and LAVi for the occurrence of CE in patients with heart failure (HF). METHODS: This was a longitudinal prospective study of 78 consecutive patients with a mean age of 47.2 years, of which 52 were males. Patients had stable HF and underwent clinical evaluation, electrocardiogram and echocardiogram assessments, with a follow-up of 26.5 months. RESULTS: The means of the variables were: 50 ms for PWD and 35.5 mL/m² for LAVi. Considering PWD > 40 ms and, as reference, LAVi > 28 mL/m², the positive predictive value of PWD was 87.5% and the negative predictive value was 76.9%. During follow-up, 21 patients had CE. There was an association between left atrial measurements, left ventricular volumes, ejection fraction and CE. There was no association between PWD and CE. At the multivariate analysis, the left atrium and LAVi were predictors of events (p = 0.00 and 0.02). Through the operating characteristic curve for the variable stable CE, areas of 0.80 and 0.69 were obtained for LAVi (p = 0.00) and LAVi > 28 mL/m² (p = 0.01). Survival curves (Kaplan-Meier) free of those events for LAVi > 28 mL/m² and for Chagas disease etiology showed an odds ratio of 14.4 (p = 0.00) and 3.2 (p = 0.03). There was no difference in outcome between patients with ischemic and nonischemic heart failure. CONCLUSION: PWD was not correlated to CE. LAVi was an independent predictor of CE, and chagasic patients showed worse outcomes.

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In-house ELISA method to analyze anti-Trypanosoma cruzi IgG reactivity for differential diagnosis and evaluation of Chagas disease morbidity
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Santos, Lilian da Silva

; Torres, Rosália Morais

; Machado-de-Assis, Girley Francisco

; Bahia, Maria Terezinha

; Martins, Helen Rodrigues

; Teixeira-Carvalho, Andréa

; Coelho-dos-Reis, Jordana Grazziela Alves

; Albajar-Viñas, Pedro

; Martins-Filho, Olindo Assis

; Lana, Marta de

Revista da Sociedade Brasileira de Medicina Tropical

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feb 2012, Volume 45 N. 1 Pages 35 - 44

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

INTRODUÇÃO: O objetivo foi desenvolver um método sorológico in-house de alta especificidade e sensibilidade para diagnosticar e monitorar a morbidade da doença de Chagas. MÉTODOS: Para tal, a reatividade sorológica de IgG e subclasses foi testada em soros de pacientes chagásicos de Berilo, Vale do Jequitinhonha/MG/Brasil. A reatividade sorológica foi também avaliada em amostras de pacientes com outras doenças infecto-contagiosas relevantes, incluindo o HIV, vírus da hepatite C (VHC), sífilis (SYP), leishmaniose visceral (LV), leishmaniose tegumentar americana (LTA) e controles não infectados (NI) para verificar o desempenho do método. Outras análises foram feitas para avaliar a aplicabilidade desta metodologia no monitoramento da morbidade da doença de Chagas. Com este propósito os pacientes com doença de Chagas foram anteriormente classificados em três grupos: indeterminados (IND), cardíacos (CARD) e digestivos/mistos (DIG/Mis) conforme seu estado clínico. RESULTADOS: A análise da reatividade sorológica de IgG total na diluição 1:40 mostrou ser uma abordagem importante no diagnóstico da doença de Chagas (100% de sensibilidade e especificidade e ausência de reação cruzada com as demais infecções). A análise das subclasses de IgG mostrou reação cruzada principalmente com NI, LV e LTA em todas as diluições. O grupo IND apresentou a maior reatividade para IgG3 e o grupo DIG/Mis apresentou nível mais elevado de IgG se comparados aos grupos IND e CARD. CONCLUSÕES: Estes achados demonstram que o método de ELISA in-house apresenta uma promissora aplicabilidade no diagnóstico diferencial e na avaliação da morbidade da doença de Chagas.

INTRODUCTION: The goal was to develop an in-house serological method with high specificity and sensitivity for diagnosis and monitoring of Chagas disease morbidity. METHODS: With this purpose, the reactivities of anti-T. cruzi IgG and subclasses were tested in successive serum dilutions of patients from Berilo municipality, Jequitinhonha Valley, Minas Gerais, Brazil. The performance of the in-house ELISA was also evaluated in samples from other relevant infectious diseases, including HIV, hepatitis C (HCV), syphilis (SYP), visceral leishmaniasis (VL), and American tegumentary leishmaniasis (ATL), and noninfected controls (NI). Further analysis was performed to evaluate the applicability of this in-house methodology for monitoring Chagas disease morbidity into three groups of patients: indeterminate (IND), cardiac (CARD), and digestive/mixed (DIG/Mix), based on their clinical status. RESULTS: The analysis of total IgG reactivity at serum dilution 1:40 was an excellent approach to Chagas disease diagnosis (100% sensitivity and specificity). The analysis of IgG subclasses showed cross-reactivity, mainly with NI, VL, and ATL, at all selected serum dilutions. Based on the data analysis, the IND group displayed higher IgG3 levels and the DIG/Mix group presented higher levels of total IgG as compared with the IND and CARD groups. CONCLUSIONS: These findings demonstrated that methodology presents promising applicability in the analysis of anti-T. cruzi IgG reactivity for the differential diagnosis and evaluation of Chagas disease morbidity.

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Seroprevalence of Chagas disease in schoolchildren from two municipalities of Jequitinhonha Valley, Minas Gerais, Brazil; six years following the onset of epidemiological surveillance
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Borges, Jaila Dias

; Assis, Girley Francisco Machado de

; Gomes, Lizziani Vasconcelos

; Dias, João Carlos Pinto

; Pinto, Ildikô Delkim Miranda

; Martins-Filho, Olindo Assis

; Torres, Rosália Morais

; Viñas, Pedro Albajar

; Bahia, Maria Terezinha

; Machado-Coelho, George Luiz Lins

; Lana, Marta de

Revista do Instituto de Medicina Tropical de São Paulo

Journal Metrics
- Sobre o periódico
- SciELO Analytics

apr 2006, Volume 48 N. 2 Pages 81 - 86

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Seis anos após o início da vigilância epidemiológica para doença de Chagas em Berilo e José Gonçalves de Minas, Vale do Jequitinhonha, MG, Brasil, foi realizado um inquérito sorológico para verificar se a transmissão desta endemia estava ocorrendo naquela área. Uma amostra aleatória de 1.412 crianças, de 7 a 14 anos, foi avaliada. Foram encontradas seis crianças positivas assintomáticas, totalizando uma prevalência de 0,4%. Hemocultura confirmou a infecção em cinco dos seis casos positivos. Uma investigação epidemiológica adicional, revelou importantes antecedentes, tais como: casos da doença em parentes e condições de moradia e ecológicas predisponentes. Nossos resultados demonstram uma soroprevalência similar (0,4%) em escolares de 7 a 14 anos àquela observada há seis anos (0,2%) em crianças de 0-9 anos. Dessa forma, considerando a presença constante de Panstrogylus megistus estes achados reforçam a necessidade de uma vigilância epidemiológica contínua e aperfeiçoada para Doença de Chagas naquela região.

Six years after the beginning of the epidemiological surveillance of Chagas disease in Berilo and José Gonçalves de Minas, Jequitinhonha Valley, MG, Brazil, a serological inquiry was performed to observe whether the transmission of this endemy was occurring in this area. A randomized sample of 1,412 children seven to 14 years old, was screened. Six asymptomatic children were found to be positive, leading to 0.4% of prevalence. Hemoculture confirmed infection in five out of the six positive cases. Additional epidemiological investigation revealed important antecedents, such as disease reports in relatives and predisposing ecological and housing conditions. Our results demonstrated similar seroprevalence (0.4%) in schoolchildren, ranging from seven to 14 years old, and that were observed six years ago (0.2%) for children 0-9 year-old. Thus, considering the constant presence of Panstrogylus megistus in the peridomicile these findings emphasize the need of continuous improved epidemiological surveillance of Chagas disease in this region.

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