2014-10-202013-03-05SIRIANO, Liliane da Rocha. Prevalência da doença de Chagas em gestantes em Goiânia-GO e integração de minicírculos de kDNA de Trypanosoma cruzi em lactentes de mães infectadas. 2013. Tese (Doutorado Medicina Tropical e Saúde Publica) - Universidade Federal de Goiás, Goiânia, 2013.http://repositorio.bc.ufg.br/tede/handle/tede/3380After 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.application/pdfAcesso AbertoLactentesPrevalênciaDoença de chagasGestantesKdnaInfantsPrevalenceChagas diseaseKdnaSAUDE COLETIVA::SAUDE PUBLICATese