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Rev. Inst. Nac. Hig ; 40(2): 44-49, dic. 2009. ilus, tab
Article in Spanish | LILACS | ID: lil-631764

ABSTRACT

Infecciones murinas experimentales con un aislado venezolano de Trypanosoma evansi ocasionan cambios ma - cros copicos y ultraestructurales en el rinon de los ratones. La modificacion macroscopica se restringe a palidez progresiva del organo. Por su parte, las alteraciones ultraestructurales incluyen incremento del grosor de la membrana basal glomerular, asi como del espesor de la membrana basal de los tubulos contorneados proximales, cambios en la colocacion y el agrupamiento de las mitocondrias asociadas a la lamina basal, asi como extenso deterioro epitelial. Los tripanosomas intravasculares fueron detectados en la circulacion renal a partir de dia 9 post-infeccion. Se discute al respecto del dano glomerular, sugiriendo que las alteraciones submicroscopicas debilitarian la funcion tubular, contribuyendo mediante un proceso nefritico al desarrollo de una falla renal aguda que culminaria con la muerte del hospedador experimental. La significancia de los cambios ultraestructurales fue corroborada estadisticamente.


Murine experimental inoculations with a Venezuelan isolate of Trypanosoma evansi cause macroscopic and ultrastructural changes in the kidney of the infected animals. The macroscopic modifications are restricted to the progressive paleness of the organ. By its part, the ultrastructural alterations include thickness enlargement of the glomerular basal and the proximal tubule basal membranes, changes in the mitochondrial grouping and layout close to the basal membrane, as well as extensive epithelial damage. Intra vascu - lar trypanosomes were seen in the renal circulation from day 9 post-infection and on. The glomerular injury is discussed, suggesting that submicroscopic alterations could weaken the tubular function contributing through a nephritic process with the development of an acute renal failure culminating in the experimental host¡¦s death. The significance of the sequential increasing ultrastructural changes was statistically corroborated.

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