8 research outputs found

    Prevalence of chagas disease in pregnant in goiânia-go and integration of minicircles of kDNA of Trypanosoma cruzi in infants from infected mothers

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    Submitted by Jaqueline Silva ([email protected]) on 2014-10-20T15:45:49Z No. of bitstreams: 2 Tese - Liliane da Rocha Siriano - 2013.pdf: 1382106 bytes, checksum: d95d1cd146dc5c4ce2277e1d362553fe (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5)Approved for entry into archive by Jaqueline Silva ([email protected]) on 2014-10-20T15:46:08Z (GMT) No. of bitstreams: 2 Tese - Liliane da Rocha Siriano - 2013.pdf: 1382106 bytes, checksum: d95d1cd146dc5c4ce2277e1d362553fe (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5)Made available in DSpace on 2014-10-20T15:46:08Z (GMT). No. of bitstreams: 2 Tese - Liliane da Rocha Siriano - 2013.pdf: 1382106 bytes, checksum: d95d1cd146dc5c4ce2277e1d362553fe (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Previous issue date: 2013-03-05Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPqFundação de Amparo à Pesquisa do Estado de Goiás - FAPEGAfter more than a century the discovery of Chagas disease, which etiological agent parasite is called Trypanosoma cruzi, there is still much to be revealed about this disease. Polymorphism, how to play, the correlation between strain and the clinical, serological and molecular methods, gene transfer and its clinical consequences, treatment and cure are topics that involve major issues still not completely understood by researchers of this enigmatic disease. The control of donors in blood banks and the reduction of vector transmissions rates caused the congenital transmission to gain greater importance. In this study, monitoring women during pregnancy allowed the accompaniment of the newborn to nine months of age, at which stage it is expected that maternal antibodies have disappeared completely. To know the population of pregnant women infected by Trypanosoma cruzi, in the service of a Maternity Hospital, 1979 records were analyzed at an interval of three years (2010 to 2012). Socioeconomic and demographic profiles, as well as reproductive and serological features were studied. Had positive serology for American trypanosomiasis 3.1% of women (61/1.979) and a few of them reported abortions. Studies have shown that abortion in infected mothers who failed to transmit their infection to the fetus had no greater frequency of miscarriage, prematurity and perinatal mortality, but there was a greater tendency to stillbirth in mothers who transmitted the infection to their children. Thirty-eight infected by T. cruzi pregnant women (two with twin pregnancies) and their fetuses (forty) participated in a survey to verify integration of kDNA minicircle of this protozoan in their children. For serological diagnosis the three conventional techniques of ELISA, IFA and HAI were performed on all samples. All mothers confirmed the positivity of Chagas disease by serology. Two children had positive serological, parasitological and molecular diagnosis of Trypanosoma cruzi, featuring congenital transmission, in addition to horizontal gene transfer. The polymerase chain reactions (PCR) were performed to identify the presence of nuclear DNA (nDNA) and mitochondrial (kDNA) in the samples studied. The amplifications were performed in triplicate with each primer pair for diagnostic confirmation. Amplification of nuclear material of T. cruzi occurred in 92.1% of mothers and 10% of children (4/40). In 70% of children and 92.1% of the mothers was no amplification of kinetoplast DNA of the parasite. Most integration events of minicircle kDNA occurred through mobile elements, with most of them the LINE-1 retrotransposon. The largest number of integrations was observed on chromosome X.Após mais de um século da descoberta da doença de Chagas, cujo agente etiológico é o parasito denominado Trypanosoma cruzi, muito ainda há para ser desvendado sobre essa doença. O polimorfismo, a forma de reprodução, a correlação entre cepa e forma clínica, métodos sorológicos e moleculares, transferência gênica e suas consequências clínicas, tratamento e cura são tópicos que envolvem grandes questionamentos ainda não totalmente elucidados pelos pesquisadores desta enigmática doença. O controle de doadores em bancos de sangue e a diminuição nos índices de transmissão vetorial fizeram com que a transmissão congênita ganhasse uma maior importância. No presente estudo, o monitoramento das mulheres durante a gestação possibilitou o acompanhamento do recém-nascido até os nove meses de idade, fase na qual se espera que os anticorpos maternos tenham desaparecido por completo. Para se conhecer a população de gestantes infectadas por Trypanosoma cruzi, no serviço da Maternidade de um Hospital Universitário, 1.979 prontuários foram analisados num intervalo de três anos (2010 a 2012). Perfis socioeconômicos e demográficos, assim como as características reprodutivas e sorológicas foram estudados. Tiveram sorologia positiva para Tripanossomíase Americana 3,1% das mulheres (61/1.979) e poucas relataram aborto. Estudos sobre o aborto demonstraram que em mães infectadas que não transmitiram sua infecção ao feto não houve maior frequência de aborto, prematuridade e mortalidade perinatal, porém, houve uma maior tendência à natimortalidade nas mães que transmitiram a infecção aos seus filhos. Trinta e oito gestantes infectadas por T. cruzi (duas com gestações gemelares) e seus conceptos (quarenta) participaram de uma pesquisa para verificar a integração de minicírculos de kDNA deste protozoário em seus filhos. Para o diagnóstico sorológico as três técnicas convencionais de ELISA, IFI e HAI foram realizadas em todas as amostras. Todas as mães confirmaram a positividade da doença de Chagas pela sorologia. Duas crianças tiveram diagnóstico sorológico, parasitológico e molecular positivos para Trypanosoma cruzi, caracterizando a transmissão congênita, além da transferência gênica horizontal. As reações de polimerização em cadeia (PCR) foram realizadas visando identificar a presença de DNA nuclear (nDNA) e mitocondrial (kDNA) nas amostras estudadas. As amplificações foram realizadas em triplicata com cada par de primers, para confirmação diagnóstica. A amplificação do material nuclear de T. cruzi ocorreu em 92,1% das mães e em 10% das crianças (4/40). Em 70% das crianças e em 92,1% das mães houve amplificação do DNA do cinetoplasto do parasito. A maior parte dos eventos de integração de minicírculos de kDNA ocorreu por meio de elementos móveis, sendo a maioria deles o retrotransposon LINE-1. O maior número de integrações foi observado no cromossomo X

    Influence of pregnancy in parasitemia hemoculture in Trypanosoma cruzi-infected pregnant women in chronic phase

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    Submitted by Luciana Ferreira ([email protected]) on 2014-11-07T11:28:15Z No. of bitstreams: 2 Dissertação - Liliane da Rocha Siriano - 2007.pdf: 877827 bytes, checksum: 8765f8f6633957232e187ede114c38fa (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5)Approved for entry into archive by Luciana Ferreira ([email protected]) on 2014-11-07T12:13:25Z (GMT) No. of bitstreams: 2 Dissertação - Liliane da Rocha Siriano - 2007.pdf: 877827 bytes, checksum: 8765f8f6633957232e187ede114c38fa (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5)Made available in DSpace on 2014-11-07T12:13:25Z (GMT). No. of bitstreams: 2 Dissertação - Liliane da Rocha Siriano - 2007.pdf: 877827 bytes, checksum: 8765f8f6633957232e187ede114c38fa (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Previous issue date: 2007-12-03The sensitivity of the technique of hemoculture was studied in 152 women infected by Trypanosoma cruzi in the chronic phase of Chagas disease, 101 pregnant and 51 non pregnant (control group). Serologic tests were positive for two or three serologic tests of different principles in all women. According to gestational age, 25 patients were under 21 weeks of gestation, 55 between 21 and 30 weeks of gestation and 21 were over 30. The pregnant women had average age of 29.2 years (from 17 to 44 years) and the control group the mean age was 34.1 years (from 18 to 49 years). Higher positivity was observed in the group of pregnant, 60.4% (61/101) compared with the control group: 29.4% (15/51). Been made seven tubes for each hemoculture held for a total of 1.064 tubes that were examined monthly, until the 150th day, a total of 5.320 tests conducted microscopic. It examined the profile of parasitemia by the number of tubes positive, in the pregnant group, the parasitemia was low in 39,6% of the tubes, average at 22,8%, and high in 37,6%. In the control group, the parasitemia was low at 70.6 %, average at 15.7 % and 13.7 % high.For naturalness most (87) were from the state of Bahia, 50 women of Goiás and 15 of other states. These results show that the technique of hemoculture identified significant differences (p <0.001) in parasitemia in pregnant in relation to the control group. This increase due to pregnancy could well encourage an increased risk of congenital transmission. Also, it could be an indication of specific treatment after pregnancy.A sensibilidade da técnica de hemocultura foi estudada em 152 mulheres infectadas pelo Trypanosoma cruzi na fase crônica da doença de Chagas, sendo 101 gestantes e 51 não gestantes (grupo controle). Os testes sorológicos foram positivos por dois ou três testes sorológicos de princípios diferentes em todas as mulheres. Segundo a idade gestacional, 25 pacientes estavam com menos de 21 semanas de gestação, 55 entre a 21ª e 30ª semanas de gestação e 21, estavam com mais de 30. As gestantes tinham idade média de 29,3 anos (de 17 a 44 anos) e no grupo controle a média de idade foi de 34,1 anos (de 18 a 49 anos). Maior positividade foi observada no grupo das gestantes, 60.4% (61/101) em relação com o grupo controle: 29.4% (15/51). Foram realizados sete tubos para cada hemocultura realizada perfazendo um total de 1.064 tubos que foram examinados mensalmente, até no 150o dia, num total de 5.320 exames microscópicos realizados. Foi analisado o perfil de parasitemia pelo número de tubos positivos: no grupo das grávidas, a parasitemia foi baixa em 39,6 % dos tubos, média em 22,8%, e alta em 37,6%. No grupo controle, a parasitemia foi baixa em 70,6%, média em 15,7% e em 13,7% alta. Em relação à naturalidade a maioria (87) era proveniente do estado da Bahia, 50 eram de Goiás e 15 de outros estados. Estes resultados demonstram que a técnica de hemocultura permitiu detectar diferenças significativas (p< 0,001) quanto a parasitemia, em gestantes em relação ao grupo controle. Este aumento devido à gestação poderia favorecer assim um maior risco de transmissão congênita. Outrossim, poderia ser uma indicação de tratamento específico após a gravidez

    Malária em Gestantes

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    Vídeo Aula que apresenta atualização sobre pincipios de eventuais complicações em gestantes com malária.Versão 1.0NÚCLEO DE TELEMEDICINA E TELESSAUDE da FACULDADE DE MEDICINA da UF

    Mandatory Notification of Chronic Chagas Disease: Confronting the Epidemiological Silence in the State of Goiás, Brazil

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    Objectives: This paper presents the results of the design and implementation process for the policy of compulsory notification of chronic Chagas disease in the Brazilian state of Goi&aacute;s (Resolution No. 004/2013-GAB/SES-GO). Methods: The narrative was based on information provided by key actors that were part of the different stages of the process, built on contextual axes based on participants&rsquo; reflections about the establishment of the most accurate and coherent notification mechanisms. Results: The notification policy addressed the absence of historical data from patients in the state Chagas program, an increase in cases identified through serology, and weaknesses in vector control. Two key challenges involved human resources capacity and dissemination to public agencies and health care workers. Effective training and communication processes were key ingredients for successful implementation. Conclusions: The lack of public health measures aimed at the epidemiological surveillance of chronic Chagas cases constitutes a significant barrier for patients to access appropriate diagnosis, management and follow-up, and hampers the planning of necessary activities within health systems. The implementation of the notification policy in Goi&aacute;s allows authorities to determine the real magnitude of Chagas disease in the population, so that an appropriate public health response can be mounted to meet the needs of affected people, thereby ending the epidemiological silence of Chagas disease

    A Utilização da Glicerina como Conservante em Soro de Indivíduos com Suspeita de Infecção por Trypanosoma Cruzi

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    Resumo: o objetivo deste estudo foi avaliar as concentrações de anticorpos anti- T. cruzi em amostras de soro puras e amostras conservadas com duas preparações diferentes de glicerina. Foram utilizados Imunofluorescência Indireta e Enzimaimunoensaio para dosagens de anticorpos. Não foram encontradas diferenças significativas na análise de amostras de soro sem ou com conservantes. Palavras-chave: Glicerina. Conservação. Anticorpos. Trypanosoma cruzi

    Congenital transmission of Trypanosoma cruzi in central Brazil. A study of 1,211 individuals born to infected mothers

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    Transmission of Trypanosoma cruziduring pregnancy is estimated to occur in less than 20% of infected mothers; however, the etiopathogenesis is not completely understood. The Centre for Studies on Chagas Disease provides confirmation of T. cruziinfection for individuals living in central Brazil. In this retrospective hospital-based study, all requests for diagnosis of T. cruziinfection in individuals less than 21 years old from 1994-2014 were searched. We end with 1,211 individuals and their respective infected mothers. Congenital transmission of infection was confirmed in 24 individuals (2%) in central Brazil, an area where the main T. cruzi lineage circulating in humans is TcII. This low prevalence of congenital Chagas disease is discussed in relation to recent findings in the south region of Brazil, where TcV is the main lineage and congenital transmission has a higher prevalence (approximately 5%), similar to frequencies reported in Argentina, Paraguay and Bolivia. This is the first report to show geographical differences in the rates of congenital transmission of T. cruziand the relationship between the prevalence of congenital transmission and the type of Tc prevalent in each region
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