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      Dilatación del Tracto Digestivo de Ratones Infectados con Trypanosoma Cruzi Translated title: Digestive Tract Dilatation of Mice Infected with Trypanosoma Cruzi

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          Abstract

          En este trabajo, analizamos las alteraciones del tracto digestivo (TD) de ratones con infección chagásica crónica, producida por Trypanosoma cruzi de diferente orígen. El examen radiológico del TD de 18 ratones infectados con T. cruzi y de 6 ratones controles no infectados, fue analizado después de la ingestión de una solución acuosa de Sulfato de Bario durante 6 horas. A los 120 días post-infección (pi), las radiografías del TD de los 5 ratones del grupo 1A infectados con tripanosomas del aislado DmI provenientes de Didelphis marsupialis, y 4 ratones del grupo 2A infectados con el aislado EP de un paciente con enfermedad de Chagas aguda, mostraron dilatación del estómago y del colon (C). A los 180 días pi las radiografías del TD de los 5 ratones del grupo 1B infectados con el aislado DmI y de los 4 ratones del grupo 2B infectados con el aislado EP mostraron una mayor dilatación del C. El análisis histológico del TD de todos los ratones infectados, reveló apreciable alteración en las capas musculares intestinales, tales como adelgazamiento de las capas muscular y mucosa, la pérdida de los pliegues y de los plexos mioentéricos. Basados en estos resultados podemos concluir que dos poblaciones de T. cruzi produjeron severas alteraciones digestivas en el modelo murino experimental utilizado y por otro lado, es posible que tales alteraciones pudieran presentarse en los órganos del sistema digestivo de casos humanos, especialmente en aquellos que viven en las diferentes áreas endémicas, donde tales alteraciones no han sido reportadas.

          Translated abstract

          This paper will analyze alterations in the digestive tract (DT) of mice with chronic Chagas’ disease infection produced by Trypanosoma cruzi from different sources. X-rays of the DT of 18 mice infected with T. cruzi and 6 control mice were compared after the ingestion of a barium sulfate solution over a period of 6 hours. 120 days post-infection (pi) the X-rays of the DT of the 5 mice in group 1A infected with trypanosomes DMI isolated from the opossum Didelphis marsupialis, and 4 mice in group 2A infected with the isolate EP takem from a patient with acute Chagas’ disease, showed swelling of the stomach and the colon (C). 180 days pi, the X-rays of the DT of the 5 mice of group 1B infected with isolated DMI and the 4 mice in group 2B infected with isolate EP, showed an even greater swelling of the C. Histological examination of the DT of all infected mice showed extensive changes of the intestinal muscle layer, such as the diminution of the muscular and mucous layers and the loss of colonic folds and myoenteric plexus. These results suggest that T. cruzi populations caused severe alterations in the digestive system of the mice used in the experiment, and that the same alterations could occur in the digestive organs of humans, especially those living in areas where Chagas’ disease is endemic, but where these anbormalities have not yet been reported.

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          Most cited references43

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          Chagas' disease and Chagas' syndromes: the pathology of American trypanosomiasis.

          F Köberle (1967)
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            Strains and clones of Trypanosoma cruzi can be characterized by pattern of restriction endonuclease products of kinetoplast DNA minicircles.

            A simple method was developed for the characterization of different strains of Trypanosoma cruzi. T. cruzi stocks isolated from vectors or by hemoculture from patients with Chagas disease could be grouped in subpopulations having similar patterns of restriction endonuclease products of kinetoplast DNA minicircles. We designate such subpopulations by the term "schizodemes." Furthermore, it is shown that, from a given T. cruzi strain, clones with different biological properties can be isolated and identified by their restriction patterns.
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              Chagas' Disease and Chagas' Syndromes: The Pathology of American Trypanosomiasis

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Journal
                ic
                Investigación Clínica
                Invest. clín
                Universidad del Zulia (Maracaibo )
                0535-5133
                September 2001
                : 42
                : 3
                : 195-210
                Affiliations
                [1 ] Universidad de los Andes
                [2 ] Universidad de los Andes Venezuela
                Article
                S0535-51332001000300005
                27aa73c9-093b-4077-924d-d6da3ae0785b

                http://creativecommons.org/licenses/by/4.0/

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                Product

                SciELO Venezuela

                Self URI (journal page): http://www.scielo.org.ve/scielo.php?script=sci_serial&pid=0535-5133&lng=en
                Categories
                MEDICINE, RESEARCH & EXPERIMENTAL

                Medicine
                X-ray study,digestive tract,chronic chagasic infection,Estudio radiológico,tracto digestivo,infección chagásica crónica.

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