Vigilancia de chagas / Chagas surveillance

Se presenta de manera breve la situación de Chagas, en particular Chagas congénita y en embarazadas hasta la Semana Epidemiológica 20, según los datos de la notificación en el Sistema Nacional de Vigilancia Sanitaria: según provincia de residencia, en Ciudad de Buenos Aires, y según clasificación epidemiológica.

Retorno social de la inversión tras eliminar la transmisión vertical de chagas, VIH/sida, HB y sífilis: caso de un municipio de la Provincia de Buenos Aires / Social Return on the investment of the elimination of the vertical transmission of Chagas, HIV / AIDS, HB and Syphilis: Case of a Municipality of the Province of Buenos Aires

Resumen Introducción: se busca cuantificar los retornos de la inversión asociados a una intervención en el sistema público de salud de un municipio de la Provincia de Buenos Aires, Argentina, consistente en el fortalecimiento de la estrategia denominada Eliminación de la Transmisión Maternoinfantil de la Infección por VIH, Sífilis, enfermedad de Chagas Congénita e Infección Perinatal por Hepatitis B (ETMI-PLUS). Metodología: el estudio (cuantitativo) se basa en la metodología de Retorno Social de la Inversión (RSI). Se establecieron definiciones ad-hoc para la medición de los retornos sobre la base de los datos disponibles provenientes de diversas fuentes: información primaria de la Secretaría de Salud del MAB; tasas de transmisión congénita de cada enfermedad notificados al Sistema Nacional de Vigilancia de Salud; presupuestos detallados de los recursos asignados al proyecto por parte de la Fundación Mundo Sano y costos de tratamientos e insumos de nomencladores oficiales. Resultados: por cada peso invertido para reforzar la ETMI-PLUS en el MAB, se obtuvo un retorno de casi 4 pesos, gracias a las mejoras en la eliminación vertical de las cuatro enfermedades y al descenso de las complicaciones cardiacas en las mujeres embarazadas diagnosticadas con chagas y tratadas oportunamente. Conclusiones: estos resultados sugieren la existencia de una relación retorno-inversión favorable, analizada bajo una perspectiva conservadora, ya que, se incluyen exclusivamente los ahorros para el sistema de salud y se excluyen otras dimensiones de los retornos vinculadas con las mejoras en los resultados alcanzados.

Abstract Introduction: we seek to quantify the returns on investment associated with an intervention in the public health system of a Municipality of the Province of Buenos Aires, Argentina. This intervention consists of strengthening the strategy for the Elimination of Mother-to-Child Transmission of HIV Infection, Syphilis, Congenital Chagas Disease and Perinatal Hepatitis B Infection, a strategy called ETMI-PLUS. Methodology: the study (quantitative) is based on the Social Return on Investment (RSI) methodology. Ad-hoc definitions are established for the measurement of returns based on the information available from various sources: primary information from the Ministry of Health of the MAB; rates of congenital transmission of each disease reported to the National Health Surveillance System; detailed budgets of the resources assigned to the project by Fundación Mundo Sano and costs of treatments and supplies from official nomenclators. Results: for each argentinean peso invested in strengthening the ETMI-PLUS in the MAB, a return of almost 4 pesos would have been obtained thanks to the improvements in the vertical elimination of the 4 diseases and the reduction of cardiac complications in pregnant women.Conclusions: these results suggest the existence of a return / investment relationship favorable to the intervention, analyzed under a conservative analysis since savings for the health system are exclusively included and other dimensions of returns associated with improvements in results are excluded.

Evaluation of triatomines infestation occurrence in home environments in the city of Taua-Ce, 2012 / Avaliação da ocorrência de infestação por triatomíneos em ambientes domiciliares no município de Tauá-Ce, 2012 / Evaluación de la ocurrencia de infestación por triatominos en ambientes domiciliarios en el municipio de Tauá-Ce, 2012

Background and Objectives: Triatomines are vectors of Trypanosoma cruzi, the etiologic agent of Chagas disease, a parasitic disease that affects mammals and humans. The destruction or transformation of natural ecotopes has intensified, resulting in the invasion of triatomines in households, bringing risks to the population. Thus, the objective of the study was to carry out a data survey on triatomine infestation in the countryside of the city of TauaCe, in 2012. Methods: This is a descriptive/exploratory study of a quantitative nature, where the Secondary data were obtained from the Municipal Health Department (Endemic Nucleus). Results: The percentage of infestation in the 15 locations studied was 26.1%, with the most affected locations being: Sítio Central do Incra 50%, Fazenda Brôco 18.2%, Jordão 16.7%, Fazenda Bom Lugar 0%, Fazenda Riacho do Mato 40%, Fazenda Cearauai 37.5%, Sítio Riacho do Mato 30%, Fazenda Cedro 17.4%, Cachoeirinha 27%, Fazenda Várzea do Feijão 24%, Cachoeira do Júlio 41.2%, Fazenda Mutuquinha 9,4%, Sítio Várzea Grande 33.3%, Iparana 9.1% and Cachoeira do Celso 16.7%. Conclusion: The study showed that there is a significant rate of triatomine infestation in the home environment, which represents a great risk to the health of the population of Taua. Therefore, a more frequent entomological control is suggested, going beyond the period of campaigns for a better monitoring of the occurrence of these insects in the area.(AU)

Justificativa e Objetivos: Triatomíneos são vetores de Trypanosoma cruzi, agente etiológico da doença de Chagas, parasitose que atinge mamíferos e humanos. A destruição ou transformação dos ecótopos naturais tem se intensificado, resultando na invasão de triatomíneos em domicílios trazendo riscos a população. Diante do exposto, o objetivo do estudo foi realizar um levantamento de dados sobre a infestação de triatomíneos em localidades do interior do município de Tauá-Ce, em 2012. Métodos: Trata-se de um estudo descritivo/exploratório de natureza quantitativa, onde os dados secundários foram obtidos junto à Secretaria de Saúde (Núcleo de Endemias) do município. Resultados: O percentual de infestação nas 15 localidades estudadas foi de 26,1%, sendo as localidades mais afetadas: Sítio Central do Incra 50%, Fazenda Brôco 18,2%, Jordão 16,7%, Fazenda Bom Lugar 0%, Fazenda Riacho do Mato 40%, Fazenda Cearauai 37,5%, Sítio Riacho do Mato 30%, Fazenda Cedro 17,4%, Cachoeirinha 27%, Fazenda Várzea do Feijão 24%, Cachoeira do Júlio 41,2%, Fazenda Mutuquinha 9,4%, Sítio Várzea Grande 33,3%, Iparana 9,1% e Cachoeira do Celso 16,7%. Conclusão: O estudo mostrou que há um expressivo índice de infestação triatomínica em ambiente domiciliar, o que representa um grande risco a saúde da população tauaense. Sendo assim, sugere-se um controle entomológico mais frequente, ultrapassando o período de campanhas para um melhor acompanhamento da ocorrência desses insetos na região.(AU)

Justificación y Objetivos: Los triatomíneos son vectores de Trypanosoma cruzi, agente etiológico de la enfermedad de Chagas, parasitosis que afecta a mamíferos y humanos. La destrucción o transformación de los ecótopos naturales se ha intensificado, resultando en la invasión de triatomíneos en domicilios trayendo riesgos a la población. Ante lo expuesto, el objetivo del estudio fue realizar un levantamiento de datos sobre la infestación de triatomíneos en localidades del interior del municipio de Tauá-Ce, en 2012. Métodos: Se trata de un estudio descriptivo/exploratorio de naturaleza cuantitativa, donde los datos secundarios fueron obtenidos junto a la Secretaría de Salud (Núcleo de Endemias) del municipio. Resultados: El porcentaje de infestación en las 15 localidades estudiadas fue de 26,1%, siendo las localidades más afectadas: Sítio Central do Incra 50%, Fazenda Brôco 18,2%, Jordão 16,7%, Fazenda Bom Lugar 0%, Fazenda Riacho do Mato 40%, Fazenda Cearauai 37,5%, Sítio Riacho do Mato 30%, Fazenda Cedro 17,4%, Cachoeirinha 27%, Fazenda Várzea do Feijão 24%, Cachoeira do Júlio 41,2%, Fazenda Mutuquinha 9,4%, Sítio Várzea Grande 33,3%, Iparana 9,1% e Cachoeira do Celso 16,7%. Conclusión: El estudio mostró que hay un expresivo índice de infestación triatomínica en ambiente domiciliar, lo que representa un gran riesgo para la salud de la población tauaense. Siendo así, se sugiere un control entomológico más frecuente, superando el período de campañas para un mejor seguimiento de la ocurrencia de esos insectos en la región.(AU)

Verificación del desempeño general del método Elecsys® Chagas en la detección de anticuerpos específicos contra Trypanosoma cruzi / Verification of the general performance of the Elecsys® Chagas method in the detection of specific antibodies against Trypanosoma cruzi

Resumen La enfermedad de Chagas es una parasitosis producida por Trypanosoma cruzi, prevalente principalmente en el continente americano, y observada en regiones no endémicas, producto de viajes y migraciones. El objetivo de este estudio fue comparar el desempeño del ensayo Elecsys® Chagas (Roche Diagnostics Alemania) (ECLIA) para el diagnóstico de la infección chagásica crónica con el método estándar y evaluar su posible empleo en reemplazo del método automatizado existente. Se estudiaron 77 muestras de sueros pertenecientes a pacientes con diagnóstico presuntivo de enfermedad de Chagas, procesadas por los distintos métodos disponibles en la Sección Parasitología del Hospital Muñiz: inmunoensayo quimioluminiscente de micropartículas (CMIA) (Abbott), enzimoinmunoanálisis de adsorción (ELISA) (Wiener) y hemaglutinación indirecta (HAI) (Lab. Lemos S.R.L.). Los resultados de los métodos ELISA y HAI fueron comparados con los obtenidos en la prueba ECLIA, y estos a su vez con el método automatizado disponible. De las muestras analizadas, 22 (28,57%) presentaron IgG anti-T. cruzi y 55 (71,43%) resultaron negativas. Con el método ECLIA se logró un 100% en los parámetros de desempeño, con diferencias en los intervalos de confianza. La razón de verosimilitud positiva y la razón de verosimilitud negativa clasificaron al ensayo como excelente y la potencia global del test apoyó esa afirmación. Los métodos inmunológicos automatizados ayudan a la performance diagnóstica en la etapa crónica de la enfermedad de Chagas, permiten minimizar errores, favorecen la velocidad de emisión de los resultados y, debido a su alta sensibilidad y especificidad, en ciertos escenarios podrían proponerse para usar como única técnica.

Abstract Chagas disease is a parasitosis caused by Trypanosoma cruzi, prevalent mainly in the American continent, and observed in non-endemic regions as a result of travel and migration. The objective of this study was to compare the performance of the Elecsys® Chagas (Roche Diagnostics Alemania) (ECLIA) assay for the diagnosis of chronic Chagas infection with the diagnostic standard, and to evaluate its possible use as a replacement for the existing automated method. A total of 77 serum samples belonging to patients with a presumptive diagnosis of Chagas disease were evaluated, processed by the different methods available in the Parasitology Section of Hospital Muñiz: microparticle chemiluminescent immunoassay (CMIA) (Abbott), enzyme-linked immunosorbent assay (ELISA) (Wiener) and indirect hemagglutination (HAI) (Lab. Lemos S.R.L). The results of the ELISA and HAI methods were compared with those obtained in the ECLIA test, and these in turn with the available automated method. Of the samples analysed, 22 (28.57%) presented IgG anti-T. cruzi and 55 (71.43%) were negative. With the ECLIA method, 100% was achieved in the performance parameters, with differences in the confidence intervals. The positive likelihood ratio and the negative likelihood ratio classify the essay as excellent, and the overall power of the test supports this statement. Automated immunological methods help diagnostic performance in the chronic stage of Chagas disease, allow minimising errors, favour the speed of issuance of results, and due to the high sensitivity and specificity, in certain scenarios, they could be proposed for use as single technique.

Resumo A doença de Chagas é uma parasitose causada pelo Trypanosoma cruzi, prevalente principalmente no continente americano, e observada em regiões não endêmicas em decorrência de viagens e migrações. O objetivo deste estudo foi comparar o desempenho do ensaio Elecsys® Chagas (Roche Diagnostics Alemanha) (ECLIA) para o diagnóstico da infecção crônica de Chagas com o método padrão e avaliar seu possível uso em substituição do método automatizado existente. Foram avaliadas 77 amostras de soro pertencentes a pacientes com diagnóstico presuntivo de doença de Chagas, processadas pelos diferentes métodos disponíveis na Seção de Parasitologia do Hospital Muñiz: imunoensaio quimioluminescente de micropartículas (CMIA) (Abbott), ensaio imunoenzimático de adsorção (ELISA) (Wiener) e hemaglutinação indireta (HAI) (Lab. Lemos S.R.L). Os resultados dos métodos ELISA e HAI foram comparados com os obtidos no teste ECLIA, e estes por sua vez com o método automatizado disponível. Das amostras analisadas, 22 (28,57%) apresentaram IgG anti-T. cruzi e 55 (71,43%) foram negativos. Com o método ECLIA, foram obtidos 100% nos parâmetros de desempenho, com diferenças nos intervalos de confiança. A razão de verossimilhança positiva e a razão de verossimilhança negativa classificam o ensaio como excelente, e a potencia geral do teste conformou essa afirmação. Os métodos imunológicos automatizados auxiliam no desempenho diagnóstico na fase crônica da doença de Chagas, permitem minimizar erros, favorecem a rapidez na emissão dos resultados e, devido à alta sensibilidade e especificidade, em determinados cenários, poderiam ser propostos para uso como técnica única.

Avaliação do conhecimento sobre a doença de Chagas em escolares das zonas rural e urbana de municípios endêmicos em Minas Gerais / Assessment of knowledge about Chagas disease in schoolchildren in rural and urban areas of endemic municipalities in Minas Gerais state, Brazil

Resumo O objetivo deste estudo foi avaliar o conhecimento de escolares do ensino médio de três escolas localizadas em municípios mineiros endêmicos para a doença de Chagas e extrair informações relativas à sua percepção em relação aos aspectos gerais, biológicos, clínicos e epidemiológicos da doença, do vetor e controle entomológico da doença de Chagas, além de comparar o conhecimento dos participantes em função da localização das escolas (zona rural ou urbana). Para isso, aplicou-se um questionário semiestruturado a 68 alunos. Todos os participantes já ouviram falar a respeito da doença de Chagas, afirmando ter adquirido esse conhecimento, sobretudo, com familiares e escola. Além disso, muitos participantes demonstraram conhecer os hábitos dos vetores, tais como hematofagia e fontes alimentares. Não houve associação clara entre o perfil de urbanização e o conhecimento dos participantes. No entanto, alunos da zona urbana apresentaram menos conhecimento prático a respeito dos triatomíneos e aspectos relativos à transmissão da doença, em relação aos alunos da zona mais "ruralizada". Sugere-se o aprofundamento do tema nos currículos escolares do ensino médio e a necessidade de elaboração de ações de educação em saúde voltadas à vigilância entomológica da doença de Chagas nesses municípios e, provavelmente, em outras regiões do Brasil.

Abstract This study aimed to evaluate the knowledge of high school students from three schools located in endemic municipalities of Minas Gerais to Chagas disease and to extract information related to their perception regarding the general, biological, clinical and epidemiological aspects of the disease, vector and entomological control of Chagas disease, in addition to comparing the knowledge of participants according to the location of schools (rural or urban area). For this, a semi-structured questionnaire was applied to 68 students. All participants have heard about Chagas disease, stating that they have acquired this knowledge, especially with family members and school. In addition, many participants demonstrated to know the habits of vectors, such as hematophagy and dietary sources. There was no clear association between the urbanization profile and the participants' knowledge. However, students from the urban area presented less practical knowledge about triatoins and aspects related to the transmission of the disease, in relation to students in the most "ruralized" area. It is suggested the deepening of the theme in high school curricula and the need to develop health education actions aimed at entomological surveillance of Chagas disease in these municipalities and, probably, in other Brazilian regions.

Territory, neglected diseases and the action of community and endemic combat agents / Território, doenças negligenciadas e ação de agentes comunitários e de combate a endemias

ABSTRACT OBJECTIVE To characterize knowledge, practices, and professional experience of community health agents (ACS) and endemic combat agents (ACE) on leprosy and Chagas disease (DC), during participation in an integrated training workshop in the IntegraDTNs-Bahia project. METHODS Descriptive and exploratory case study, involving health agents and endemic combat agents participating in a training workshop on the shared role of these professionals in health care and surveillance processes. The project was developed in the municipalities of Anagé, Tremedal and Vitória da Conquista, in the southwestern State of Bahia, 2019-2020. A specific instrument was applied, with questions related to knowledge and practices of surveillance and care for leprosy and Chagas disease. Descriptive analysis of the data, in addition to consolidation of the lexical analysis, was performed. RESULTS Out of a total of 135 participants (107 ACS and 28 ACE), 80.7% of them have been working for at least 12 years, without previous participation in joint training processes. Only 17.9% of endemic combat agentes reported having participated in training on leprosy and none reported developing specific actions to control the disease. For Chagas disease, 36.4% of community health agents participated in training more than a decade before, while for 60.7% of endemic combat agents the last training was carried out in the last five years. The development of educational actions for Chagas disease was more frequent for endemic combat agents (64.3%). When asked about ways of recognizing diseases, the term "skin spots" was the most reported (38 times) for leprosy and, for Chagas disease, the term "I don't know" (17 times). CONCLUSION Processes of health agents and endemic combat agents action in realities endemic for leprosy and Chagas disease in the interior of Bahia proved to be fragmented in the territories. For these diseases, the distance between surveillance and health care actions is reinforced, including in training processes. The importance of innovative permanent and integrated education actions is reiterated to actually promote changes in practices.

RESUMO OBJETIVO Caracterizar conhecimentos, práticas e experiência profissional de agentes comunitários de saúde (ACS) e agentes de controle de endemias (ACE) sobre hanseníase e doença de Chagas (DC), durante participação em oficina de formação integrada no projeto IntegraDTNs-Bahia. MÉTODOS Estudo de caso descritivo e exploratório, envolvendo comunitários de saúde e agentes de controle de endemias, participantes de oficina de formação sobre o papel compartilhado desses profissionais no processo de vigilância e atenção à saúde. Projeto desenvolvido nos municípios de Anagé, Tremedal e Vitória da Conquista, no Sudoeste do Estado da Bahia, 2019-2020. Aplicou-se instrumento específico prévio com questões relativas a conhecimentos e práticas de vigilância e atenção para hanseníase e doença de Chagas. Análise descritiva dos dados, além de consolidação da análise léxica. RESULTADOS Do total de 135 participantes (107 ACS e 28 ACE), 80,7% deles atuam há pelo menos 12 anos, sem participação prévia em processos de formação conjunta. Apenas 17,9% dos agentes de controle de endemias relataram ter participado de capacitações sobre hanseníase e nenhum informou desenvolver ações específicas de controle da doença. Para a doença de Chagas, 36,4% dos agentes comunitários de saúde participaram de capacitações há mais de uma década, enquanto para 60,7% dos agentes de controle de endemias a última capacitação foi realizada nos últimos cinco anos. O desenvolvimento de ações educativas para a doença de Chagas foi mais frequente para agentes de controle de endemias (64,3%). Quando perguntados sobre formas de reconhecimento das doenças, a palavra "manchas na pele" foi a mais relatada (38 vezes) para hanseníase e, para a doença de Chagas, a palavra "não sei" (17 vezes). CONCLUSÃO Os processos de atuação de agentes comunitários de saúde e agentes de controle de endemias em realidades endêmicas para hanseníase e doença de Chagas no interior da Bahia revelaram-se desintegrados nos territórios. Para essas doenças, reforça-se o distanciamento entre ações de vigilância e de atenção à saúde, inclusive nos processos de capacitação. Reitera-se a importância de ações inovadoras de educação permanentes e integradas para promover de fato mudanças nas práticas.

Diseño y validación de cuestionario de conocimientos, actitudes y prácticas de la enfermedad de Chagas / Design and validation of the survey of knowledge, attitudes and practices of Chagas disease

La enfermedad de Chagas es considerada una afección desatendida a nivel mundial que afecta principalmente a la población de escasos recursos en Latinoamérica, con aproximadamente 10 millones de personas afectadas. Se estima que en Ecuador más de 200000 personas son seropositivas para T. cruzi y 4.400 adquieren la infección anualmente. Se han realizado estudios en zonas endémicas como Loja, Manabí, Guayas y El Oro, las cuales constituyen el hábitat de cinco especies de triatómicos, responsables de la transmisión vectorial de la enfermedad, no obstante, se requiere información epidemiológica actualizada en áreas consideradas prioritarias. Es por ello, que se realizó un estudio descriptivo transversal para diseñar y validar un cuestionario de conocimientos, actitudes y prácticas de la enfermedad de Chagas en las 5 áreas prioritarias en Ecuador. Se diseñó un cuestionario inicial de 36 ítems, empleado para un estudio piloto con 5 expertos claves que validaron dicho instrumento, Para evaluar la validez de contenido se empleó la V de Aiken (0,82) y la validez del constructo fue evaluada a través del análisis factorial exploratorio, del cual se obtuvieron 3 dimensiones; ´ mientras que la prueba de alfa de Cronbach (>0,7) demostró la consistencia interna del instrumento. La versión final del cuestionario contentiva de 31 ítems fue aplicada a 20 participantes con características epidemiológicas diferentes de cada área prioritaria, demostrando que el mismo reúne todas las condiciones de validación y confiabilidad y puede ser aplicado en otros estudios epidemiológicos relacionados con la enfermedad de Chagas(AU)

Chagas disease is considered a neglected condition worldwide which mainly affects the poor population in Latin America, with approximately 10 million people affected. It is estimated that in Ecuador more than 200,000 people are seropositive for T. cruzi and 4,400 acquire the infection annually. Studies have been carried out in endemic areas such as Loja, Manabí, Guayas and El Oro, which constitute the habitat of five species of triatomics, responsible for the vector transmission of the disease, however, updated epidemiological information is required in areas considered priority. For this reason, a cross-sectional descriptive study was carried out to design and validate a questionnaire on knowledge, attitudes and practices of Chagas disease in the 5 priority areas in Ecuador. An initial questionnaire of 36 items was designed, used for a pilot study with 5 key experts who validated said instrument. To evaluate the content validity, Aiken's V (0.82) was used and the validity of the construct was evaluated through the exploratory factor analysis, from which 3 dimensions were obtained; While the Cronbach's alpha test (> 0.7) demonstrated the internal consistency of the instrument. The final version of the questionnaire containing 31 items was applied to 20 participants with different epidemiological characteristics from each priority area, showing that it meets all the validation and reliability conditions and can be applied in other epidemiological studies related to Chagas disease(AU)

Estrategias para la detección precoz y vigilancia entomológica del mal de Chagas en Ecuador: entre el olvido y la reemergencia / Strategies for the early detection and entomological surveillance of Chagas disease in Ecuador: between oblivion and reemergence

La enfermedad de Chagas (EC) es originada por el protozoario Trypanosoma cruzi, constituyendo un problema social y de salud pública en las Américas. En los últimos años en Ecuador existe un repunte sostenido de casos de EC y la Organización Mundial de la Salud (OMS) en el año 2020, enfatizó la necesidad de aplicar estrategias para control de enfermedades tropicales desatendidas 2021-2030, incorporando lineamientos relacionados con la EC. Se realizó un estudio descriptivo con el fin de verificar la adopción por parte del estado ecuatoriano de estrategias para detección precoz y vigilancia entomológica de EC, de acuerdo a la hoja de ruta propuesta por la OMS. Para ello, se consultó la epidemiología de EC durante el período 2013-2020, se revisó lineamientos y estrategias para eliminación de enfermedades desatendidas, se realizó análisis epidemiológico de EC y se categorizaron las estrategias para detección precoz de EC. Se observó un incremento de casos de EC crónica respecto a la EC aguda (n=432; 78,26% vs 21,74%). Además, el estado ecuatoriano aplica lineamientos de interrupción de transmisión vectorial domiciliaria y transfusional, eliminación de EC congénita y cobertura de tratamiento antiparasitario de la población en riesgo, no obstante, no se aplican medidas para la interrupción de transmisión por trasplante de órganos(AU)

Chagas disease (CD) is caused by the protozoan Trypanosoma cruzi, constituting a social and public health problem in the Americas. In recent years in Ecuador there has been a sustained rebound in CD cases and the World Health Organization (WHO) in 2020, emphasized the need to apply strategies for the control of neglected tropical diseases 2021-2030, incorporating guidelines related to the EC. A descriptive study was carried out in order to verify the adoption by the Ecuadorian state of strategies for early detection and entomological surveillance of CD, according to the roadmap proposed by the WHO. To do this, the epidemiology of CD was consulted during the 2013-2020 period, guidelines and strategies for elimination of neglected diseases were reviewed, epidemiological analysis of CD was carried out, and strategies for early detection of CD were categorized. An increase in chronic CD cases was observed compared to acute CD (n = 432; 78.26% vs 21.74%). In addition, the Ecuadorian state applies guidelines for the interruption of domiciliary and transfusion vector transmission, elimination of congenital CD and coverage of antiparasitic treatment of the population at risk, however, no measures are applied for the interruption of transmission by organ transplantation. In this sense, it is necessary to implement strategies and protocols, aimed at detecting parasitosis in transplanted patients, as well as training communities around the interruption of vector transmission of CD(AU)

Enfermedad de Chagas: actualización de un desafío vigente / Chagas disease: update of a current challenge

El objetivo de este artículo de revisión narrativa fue generar un documento de consulta con la información actualizada existente respecto a la Enfermedad de Chagas. La enfermedad de Chagas causada por el protozoo Trypanosoma cruzi, es identificado en la primera década del siglo XX. Seguida a la infección aguda, se puede desarrollar una enfermedad crónica. Hasta en el 30-40% de los casos se caracteriza por miocardiopatía, arritmias y megavísceras. La progresión a la miocardiopatía es devastadoramente rápida y se manifiesta con insuficiencia cardíaca y muerte súbita. Hoy continúa siendo un importante problema de salud pública, no sólo en países endémicos, como consecuencia de la movilidad poblacional entre Latino América, y otros países del mundo.

The objective of this narrative review article was to generate a consultation document with the existing updated information regarding Chagas disease. Chagas disease caused by the protozoan Trypanosoma cruzi, is identified in the first decade of the 20th century. Following acute infection, a chronic disease can develop. In up to 30-40% of cases it is characterized by cardiomyopathy, arrhythmias, and mega viscera. The progression to cardiomyopathy is devastatingly rapid, manifesting with heart failure and sudden death. Today it continues to be an important public health problem, not only in endemic countries, as a consequence of population mobility between Latin America and other countries in the world.

Do the new triatomine species pose new challenges or strategies for monitoring Chagas disease? An overview from 1979-2021

Chagas disease persists as one of the most important, and yet most neglected, diseases in the world, and several changes in its epidemiological aspects have been recorded since its discovery. Currently, some of the most relevant changes are related to: (i) the reduction in the incidence of the endemic due to the control of the most important vectors, Triatoma infestans and Rhodnius prolixus, in many countries; (ii) the migration of human populations spreading cases of the disease throughout the world, from endemic to non-endemic areas, transforming Chagas disease into a global threat; and (iii) new acute cases and deaths caused by oral transmission, especially in the north of Brazil. Despite the reduction in the number of cases, new challenges need to be responded to, including monitoring and control activities aiming to prevent house infestation by the secondary vectors from occurring. In 1979, Lent & Wygodzinsky(1) published the most complete review of the subfamily Triatominae, encompassing 111 recognised species in the taxon. Forty-two years later, 46 new species and one subspecies have been described or revalidated. Here we summarise the new species and contextualise them regarding their ecology, epidemiologic importance, and the obstacles they pose to the control of Chagas disease around the world.

Cardiac Magnetic Resonance in the Assessment of Chagas Disease and its Complications

Abstract The well-known occurrence of Chagas disease in endemic areas has become a worldwide problem, and cardiac magnetic resonance allows the early detection of cardiac involvement and complications of this disease. Cardiac magnetic resonance is a useful tool in all phases of Chagas disease, and new promising techniques using T1 mapping and extracellular volume measurements are able to detect cardiac involvement even earlier than conventional techniques.

La investigación biomédica y su relación con el control de la enfermedad de Chagas / Biomedical research and its relationship with the control of Chagas disease

En la Enfermedad de Chagas la investigación biomédica ha hecho avances importantes en áreas del conocimiento del parásito, vectores e interrelación hospedero/ parásito. El nuevo contexto epidemiolólogicomuestra una reducción de casos de la enfermedad de Chagas en el continente americano, sin embargo sigue siendo un problema de salud pública. El estudio del genoma de Trypanosoma cruzi deja como desafío el desarrollo de nuevos medicamentos, vacunas y estudios de proteomica en el futuro inmediato. Por otra parte el estudio del genoma de Rhodnius prolixus abre camino para controlar el vector y hallar nuevas maneras de prevenir la transmisión de la enfermedad. La demostración correcta del agente patógeno o de sus productos en tejidos o fluidos conlleva al diagnóstico acertado, en el caso del T. cruzi, esta detección no siempre es posible debido a la baja presencia del parásito en sangre, por esto los métodos de diagnóstico serológicos (indirectos) han sido los más desarrollados y utilizados. Los métodos de detección directa como la PCR y la qPCR presentan alternativas diagnósticas. Recientes estudios sobre la variabilidad genética del parásito han dado nuevas luces sobre los diferentes escenarios de los ciclos de transmisión de la enfermedad, patogénesis en humanos, ciclo zoonótico y aspectos co-evolutivos. Benzonidazol y Nifurtimox son las únicas drogas que se utilizan para el tratamiento. Las actividades de minería, explotación petrolera y siembra de cultivos agroindustriales en América Latina han ocasionado profundas modificaciones en los ecosistemas con la consecuente alteración del ciclo zoonótico de la enfermedad de Chagas. omo conclusión se requiere continuar con los esfuerzos en el desarrollo de nuevos medicamentos y la búsqueda de biomarcadores de eficacia terapéutica en pacientes que reciben los actuales medicamentos y que también permitan el pronóstico de la patogénesis(AU)

In Chagas disease, biomedical research has made important advances in areas of knowledge of the parasite, vectors, and host / parasite interrelationship. The new epidemiological context shows a reduction in cases of Chagas disease in the American continent, however it continues to be a public health problem. The study of the Trypanosoma cruzi genome leaves as a challenge the development of new drugs, vaccines and proteomic studies in the immediate future. On the other hand, the study of the Rhodnius prolixus genome opens the way to control the vector and find new ways to prevent the transmission of the disease. Correct demonstration of the pathogen or its products in tissues or fluids leads to the correct diagnosis, in the case of T. cruzi, this detection is not always possible due to the low presence of the parasite in blood, for this reason serological diagnostic methods (indirect) have been the most developed and used. Direct detection methods such as PCR and qPCR present diagnostic alternatives. Recent studies on the genetic variability of the parasite have shed new light on the different scenarios of the disease transmission cycles, pathogenesis in humans, zoonotic cycle and co-evolutionary aspects. Benzonidazole and Nifurtimox are the only drugs that are used for treatment. The activities of mining, oil exploitation and planting of agro-industrial crops in Latin America have caused profound changes in ecosystems with the consequent alteration of the zoonotic cycle of Chagas disease. As a conclusion, it is necessary to continue with the efforts in the development of new drugs and the search for biomarkers of therapeutic efficacy in patients who receive the current drugs and that also allow the prognosis of the pathogenesis(AU)

Enfermedad de Chagas y el binomio madre-hijo / Chagas disease and the mother-son binomy

La infección por Trypanosoma cruzi está garantizada por la presencia del parásito en muchos géneros animales incluido el hombre. Este a su vez, no solo adquiere el parásitoa través del vector (cutánea, por mucosas, oral) o por secreciones de didelfidos o accidentalmente por manipulación de material biológico infectante,sino también por la trasmisión hombre-hombre la cual aumenta la diseminación de la Enfermedad de Chagas aunque en menor proporción (trasmisión congénita, transfusional o por trasplante de tejidos). El parásito alcanza al feto in utero principalmente por su capacidad de atravesar la placenta especialmente después de la semana 20 cuando la barrera placentaria se adelgaza progresivamente. Sin embargo solo del 1 al 10% de los niños nacidos de madres con Enfermedad de Chagas desarrollan infección aguda variando de acuerdo al país, edad gestacional, al genotipo y carga del parásito entre varios factores. La clínica del neonato con T. cruzi va desde casos asintomáticos, bajo peso, prematuridad, hepatoesplenomegalia, dificultad respiratoria,hastael desenlace fatal. La prevención se basa en la detección por serología y tratamiento oportuno en niñas y mujeres antes del embarazo ya que los antiparasitarios específicos producen efectos adversos y en principio están contraindicados durante el embarazo. En cambio el tratamiento está indicado en el niño en cualquier momento cuando se demuestre la patología. El despistaje de la infección por T. cruzi debería ser obligatorio en toda Latinoamérica y en toda mujer latinoamericana en el mundo a fin de estar preparado para la atención postparto al infante y a la madre(AU)

Infection with Trypanosoma cruzi is guaranteed by the presence of the parasite in many animal genera including man. This in turn, not only acquires the parasite by contact with a vector (skin, mucoses and oral transmission) or by secretions of didelfides or accidentally by manipulation of infecting biological material, but also by man-man transmission which increases the spread of Chagas disease (congenital, transfusion or tissue transplant transmission). The parasite reaches the fetus in utero mainly due to its ability to cross the placenta especially after week 20 when the placental barrier becomes progressively thinner. However, only 1 to 10% of children born from mothers with Chagas disease develop acute infection, varying according to country, gestational age, genotype, and parasite load among various factors. The clinic of the neonate with T. cruzi ranges from asymptomatic cases, low weight, prematurity, hepatosplenomegaly, respiratory distress to the fatal outcome. Prevention is based on the detection by serology and timely treatment in girls and women before pregnancy since specific antiparasitic drugs produce adverse effects and are in principle contraindicated during pregnancy. Instead, treatment is indicated in the child at any time when the pathology is demonstrated. The screening of T. cruzi infection should be mandatory in all Latin America and in all Latin American women in the world in order to be prepared for the postpartum care of the infant and the mother(AU)

Efecto de la educación comunitaria para control integrado del Triatoma Dimidiata (Hemiptera: Reduviidae) / EEffect of community education in an integrate control for Triatoma dimidiata (Hemiptera: Reduviidae) / EEffect of community education in an integrate control for Triatoma dimidiata (Hemiptera: Reduviidae)

Introduction: The Mesoamerican endemic specieTriatoma dimidiata is the main vector of Chagas disease in Central America, after the elimination of an introduced vector Rhodnius prolixus. The traditional method of vector control using insecticides results in reinfestation. An integrated Ecohealth approach, including education, house improvements and domestic animal management was shown effective for long-term control ofT. dimidiata, and it was applied in several villages in Guatemala. Objective: To evaluate the changes in community practices after an Ecohealth intervention in La Prensa, Olopa Chiquimula. Methods: Through three surveys, we measured risk factors associated withT. dimidiatainfestation, the infestation index, blood sources of T. dimidiata, the presence of Trypanosoma cruzi were analyzed using PCR. Statistics analysis included Wilcoxon signed-rank tests, Mc-Nemar test, Chi-square test and Fisher exact test to compare the surveys. Results: Over the years, risk factors associated with the presence of T. dimidiata and population density of the vector were observed. We found a decrease in consumption of human blood and the parasite in the vector population. However, we found the consumption of bird blood meal increased Conclusions: Our results provide evidence that an ecohealth approach for an endemic Chagas vector has impact on reducing vector-human contact, possibly by influencing people's behavior. Increasing the community knowledge about these risk factors can be an effective strategy to further reduce the risk of house reinfestation and Chagas transmission(AU)

Introducción: La especie endémica mesoamericana Triatoma dimidiata es el vector principal de la enfermedad de Chagas en América Central, después de la eliminación de un vector introducido Rhodnius prolixus. El método tradicional de control de vectores que utiliza insecticidas resulta en reinfestación. Se demostró que un enfoque integrado de ecosalud, que incluye la educación, mejorías en el hogar y manejo de animales domésticos, es efectivo para el control a largo plazo del T. dimidiata, y se aplicó en varias aldeas de Guatemala. Objetivo: evaluar los cambios en las prácticas comunitarias después de una intervención de ecosalud en La Prensa, Olopa Chiquimula. Métodos: a través de tres encuestas, se midieron los factores de riesgo asociados con la infestación de T. dimidiata, el índice de infestación, las fuentes sanguíneas de T. dimidiata y la presencia de Trypanosoma cruzi. Estas encuestas se analizaron mediante PCR. El análisis estadístico incluyó pruebas de Wilcoxon de rango con signo, la prueba de Mc-Nemar, la prueba de Chi-cuadrado y la prueba exacta de Fisher para comparar las encuestas. Resultados: A lo largo de los años, se observaron factores de riesgo asociados con la presencia de T. dimidiata y la densidad de población del vector. Encontramos una disminución del parásito en la población de vectores y en el consumo de sangre humana. Sin embargo, encontramos que aumentó el consumo de harina de sangre de aves. Conclusiones: Nuestros resultados proporcionan evidencia de que un enfoque de ecosalud para un vector de Chagas endémico impacta en la reducción del contacto vector-humano, posiblemente al influir en el comportamiento de las personas. Aumentar el conocimiento de la comunidad sobre estos factores de riesgo puede ser una estrategia efectiva para reducir aun más el riesgo de reinfestación en la casa y la transmisión de Chagas(AU)

Doença de chagas: uma atualização bibliográfica / Chagas disease: a bibliographic update

É uma doença infecciosa causada por um protozoário parasita chamado Trypanosoma cruzi,nome dado por seu descobridor, o cientista brasileiro Carlos Chagas, em homenagem a outro cientista, também brasileiro, Oswaldo Cruz. Essa doença é conhecida popularmente como doença do coração crescido, além disso, os locais com mais índices dessa doença são as regiões do Norte e Sudeste e tem como formas de diagnósticos exames de sorologiaparasitários e xenodiagnóstico. E uma das principais formas de prevenção da doença vem sendo o uso de telas e repelentes.

It is an infectious disease caused by a protozoan parasite calledTrypanosoma cruzi, named after its discoverer, the Brazilian scientistCarlos Chagas, in honor of another scientist, also, Brazilian, Oswaldo Cruz. This disease is popularly known as a disease of the heart grown, in addition, the sites with the most indexes of this disease are the regions of the North and southeast and have as diagnostic methods serologica tests parasitic and xenodiagnosis. And one of the main forms of prevention of the disease has been the use of screens and repellents.

Indicadores entomológicos de triatomíneos no Estado do Rio Grande do Norte, Brasil / Entomological triatomine indicators in the State of Rio Grande do Norte, Brazil

Resumo Objetivou-se descrever os principais indicadores entomológicos relacionados aos triatomíneos na mesorregião Oeste do Rio Grande do Norte. Trata-se de estudo descritivo, transversal e retrospectivo, desenvolvido com base em análise histórica de informações sobre a captura de triatomíneos realizada pelo Programa de Controle de doença de Chagas, no período de 2008 a 2013. Foram capturadas cinco espécies, das quais se destacaram a Triatoma brasiliensis e a Triatoma pseudomaculata, pela ocupação do ambiente domiciliar e peridomiciliar, sequencialmente, e a Panstrongylus lutzi, pelo maior índice de infecção natural. Observou-se prevalência de ninfas dentre os exemplares capturados, maior densidade triatomínica no peridomicílio, índices de infestação, colonização e infecção natural de 5,6%, 49,6% e 0,8%, respectivamente, diferença significativa na distribuição de espécimes entre os municípios investigados e ausência de declínio dos índices de infestação e colonização entre os anos de 2009 e 2012. Os achados sugerem a necessidade de vigilância contínua, possibilitada pela associação entre as equipes de campo e as comunidades, com ênfase na proposta de educação em saúde para o reconhecimento e notificação dos triatomíneos pela população.

Abstract This study aimed to describe the main entomological triatomine-related indicators in the western mesoregion of Rio Grande do Norte. This is a descriptive cross-sectional retrospective study developed on a historical analysis of information on the triatomine capture carried out by the Chagas Disease Control Program, from 2008 to 2013. Five species were captured, of which the Triatoma brasiliensis and Triatoma pseudomaculata, by occupying the domestic and peridomestic environment, sequentially, and Panstrongylus lutzi by the highest rate of natural infection. A prevalence of nymphs among the captured specimens, a higher triatominal density in the peridomicile, infestation, colonization and natural infection rates of 5.6%, 49.6% and 0.8%, respectively, a significant difference in the distribution of specimens between the municipalities investigated and lack of declining infestation and colonization rates between 2009 and 2012 was observed. Findings suggest the need for continuous surveillance, facilitated by the association between field teams and communities, with emphasis on the proposal of health education for the recognition and notification of triatomines by the population.

Synanthropic triatomines (hemiptera: reduviidae): infestation, colonization, and natural infection by trypanosomatids in the state of Rio Grande do Norte, Brazil

Abstract INTRODUCTION The ecoepidemiological situation in the State of Rio Grande do Norte, Brazil is characterized by frequent invasion and colonization of domiciliary units (DUs) by several triatomine species, with high rates of natural infection by Trypanosoma cruzi. METHODS: We evaluated the possibility of vector transmission of T. cruzi based on records of the occurrence of domiciled triatomines collected by the Secretariat of State for Public Health from 2005 to 2015. During this period, 67.7% (113/167) of municipalities conducted at least one active search and 110 recorded the presence of insects in DUs. These activities were more frequent in municipalities considered to have a high and medium-level risk of T. cruzi transmission. RESULTS Of 51,569 captured triatomines, the most common species were Triatoma brasiliensis (47.2%) and T. pseudomaculata (40.2%). Colonies of T. brasiliensis, T. pseudomaculata, T. petrocchiae, Panstrongylus lutzi, and Rhodnius nasutus were also recorded in the intradomicile and peridomicile. Natural infection by trypanosomatids was detected in 1,153 specimens; the highest rate was found in R. nasutus (3.5%), followed by T. brasiliensis (2.5%) and T. pseudomaculata (2.4%). There have been high levels of colonization over the years; however, not all infested DUs have been sprayed. CONCLUSIONS: This is the first report of intradomicile and peridomicile colonization by P. lutzi. These results demonstrate the risk of new cases of infection by T. cruzi and reinforce the need for continuous entomological surveillance in the State of Rio Grande do Norte.

Eliminación de la transmisión materno-infantil de HIV, sífilis, enfermedad de Chagas y hepatitis B. Análisis de factibilidad / Elimination of mother-to-child transmission of HIV, syphilis, Chagas disease and hepatitis B. Feasibility analysis

In 2016 through the approval of the Action Plan for the Prevention and Control of HIV infection and mother-to-child transmission infections 2016-2021. The action plan extends the ETMI initiative (hence the name "ETMI Plus"). The ETMI Plus initiative aims to achieve and maintain the elimination of mother-to-child transmission of HIV infection, syphilis, Chagas disease and perinatal infection with hepatitis B virus (HBV) as problems that constitute a danger to public health. The objective of the present work is to carry out a study of the condition of these diseases in the Argentine Republic and to carry out an epidemiological analysis of the possible difficulties in the implementation of the presented Strategy. (AU)

Introducción. En 2016 mediante la aprobación del Plan de Acción para la Prevención y el Control de la Infección por el VIH y las infecciones de transmisión madre niño 2016-2021. El plan de acción amplía la iniciativa de ETMI (de ahí el nombre de "ETMI Plus"). La iniciativa ETMI Plus tiene por objetivo lograr y mantener la eliminación de la transmisión materno-infantil de la infección por el VIH, la sífilis, la enfermedad de Chagas y la infección perinatal por el virus de la Hepatitis B (VHB) como problemas que constituyen un peligro para la salud pública. El objetivo del presente trabajo es efectuar un estudio de la condición de éstas enfermedades en la República Argentina y realizar un análisis epidemiológico de las posibles dificultades en la implementación de la Estrategia presentada. Material y Métodos. Fueron analizadas fuentes secundarias de información de circulación general como el Boletín Integrado de Vigilancia, Ministerio de Salud Nación, Boletines Provinciales. Como fuente primaria de información se realizó encuesta anónima WEB ­ Based a profesionales de maternidades de Argentina. La encuesta no recabó información del profesional, identificación de la institución, provincia participante. Se solicitó el dato consolidado de prestaciones brindadas de los meses de abril ­ mayo 2018. La información fue ordenada y compilada según su relación temporal y específica para cada una de las enfermedades analizadas. Resultados. Al analizarse la información del Boletín Epidemiológico Nacional 2017 es posible efectuar cálculos sobre los datos brindados en los que se informa el número de embarazadas estudiadas para las enfermedades involucradas (40,18%), es decir que no se tiene testimonio de lo que ocurre con el otro 60% de las mujeres. Tomando el valor informado en las estudiadas y calculando en la población total de nacimientos se observa que el nuevo valor estimado triplica al informado, en HIV que el sistema informa 585 casos positivos pasa a 1.456, en sífilis de 9.190 a 23.645 y en Chagas de 4261 a 13.699. Cuando se analiza el número de niños estudiados sobre el estimado de madres positivas se observa que de las mujeres embarazadas estimadas positivas alrededor de 10% de los niños son estudiados. Conclusión. Las enfermedades de transmisión materno-infantil (HIV, la sífilis congénita, Chagas y Hepatitis B) sigue siendo un problema importante que recibe poca atención. Entre los factores que pueden ser considerados como favorecedores de la persistencia de estas enfermedades como un problema de salud pública pueden mencionarse la falta de percepción de las posibles consecuencias graves de éstas por parte de la población y la poca atención de los profesionales que no lo incorporan en sus actividades cotidianas. A lo mencionado se puede agregar la escasez de técnicas adecuadas y oportunas para el diagnóstico, como así las consideraciones macro de la organización sanitaria y la no adecuada atención entre los formuladores de políticas, gestores de programas y proveedores de atención médica. (AU)

Protocolo del Sistema Nacional de Vigilancia Epidemiológica: enfermedades vectoriales de origen parasitario. No. 04 / Protocol of the National Epidemiological Surveillance System: vector diseases of parasitic origin. No. 04

Estos protocolos están dirigido a personal médico, paramédico y otros profesionales que realizan acciones gerenciales y operativas de vigilancia epidemiológica en los servicios de salud del país, y están divididos en varios tomos para dar a conocer y actualizar la identificación y medidas de control para diversos padecimientos a fin de continuar con el mejoramiento de las capacidades técnicas de los trabajadores de salud, que permita planificar la prestación de servicios con decisiones partiendo de un enfoque epidemiológico comprobado, para responder a los cambios de tendencias epidemiológicas y con ello contribuir al fortalecimiento de prácticas asertivas de la salud pública de nuestro país.