Trypanosoma (herpetosoma) rangeli tejera, 1920: preliminary report on histopathology in experimentally infected mice

Revista do Instituto de Medicina Tropical de São Paulo

Cecilia De Scorza²  Servio Urdaneta-morales¹  Felix Tejero¹ 

[1] ,Universidad de Los Andes Facultad de Ciencias Departamento de BiologiaMerida,Venezuela

关键词: Experimental trypanosomiasis;    Trypanosoma (Herpetosoma) rangeli Tejera;    1920;    mice;   

DOI  :  10.1590/S0036-46651986000500014

来源: SciELO

【 摘 要 】

Male mice (NMRI strain) of 3 and 5 g were inoculated i. p. with 8 x 10(6) and 9 x 10(4) metatrypomastigotes/g harvested from a 12-day-old LIT culture of Trypanosoma rangeli of the "Dog-82" strain. At regular intervals after inoculation, the animals were sacrificed and portions of heart, liver, spleen, lung, thigh, kidney, stomach, intestine, brain, sternum, and vertebral column were embedded in paraffin, sectioned, and stained with haematoxylin-eosin and Giemsa colophonium. Pathology was encountered in the first five tissues cited above. The subcutaneous, periosteal, interstitial, and peribronchial connective tissues, and later the muscle cells of the heart, were heavily parasitized by amastigotes and trypomastigotes. The possible reasons for the decrease in tissue parasitosis at the same time that the parasitemia is reaching its peak, and for the low level of inflammation in the parasitized tissues, are discussed. The observations of other workers, as well as the results described here, indicate that certain strains of T. rangeli under certain conditions may well cause pathological alterations in mammals.

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