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American Journal of Pathology, Vol 80, 153-162, Copyright © 1975 by American Society for Investigative Pathology

REGULAR ARTICLES

Immunopathologic and morphologic studies of skeletal muscle in Chagas' disease

RP Laguens, PM Cossio, C Diez, A Segal, C Vasquez, E Kreutzer, E Khoury and RM Arana

Skeletal muscle biopsies from 21 individuals infected with Trypanosoma cruzi were studied my means of immunofluorescence, ultrastructural immunochemical, light and electron microscopic, and histochemical procedures. In 12 cases, definite morphologic alterations were found. These alterations were coincident with the presence of circulating antibodies against the plasma membrane of striated muscle fibers and endothelial cells (EVI antibodies). In almost all cases the lesions also presented autologous immunoglobulins bound to the plasma membrane of muscle fibers and endothelial cells. Interstitial inflammatory exudate was not observed in the diseased muscle. On the basis of these observations, it is suggested that the EVI antibody is related to some of the pathogenetic mechanism of skeletal muscle damage in Chagas' disease.


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Copyright © 1975 by the American Society for Investigative Pathology.