Trupanosoma (Typanozoon evansi) (STEEL, 1885) Balbiani, 1888, infecção experimental em equino com amostra isolada de capivara, Hydrochaeris hydrochaeris (LINNAEUS, 1766) (Rodentia: hydrochaeridae)

Abstract

Parasitological, clinical and laboratory findings of the experimental infection of a horse with a strain of T. evansi isolated from the capybara (H Hydrochaeris) are reported. it was shown that the parasite was able to infect the horse and the parasitosis presented a chronic course; clinically intermittent fever, coinciding with febrile and paraistaemic peaks, was observed. Haematological alterations were: decrease of the erythrocyte numbers, haemoglobin content and the mean globular volume. A fine granulated cut surface was observed on the enlarged spleen at necropsy. Microscopically, the organ presented intense activity of the germinal centers and congestion of the sinusoides. Macrophages laden with hemossiderin were observed in the spleen, liver, kidneys, adrenal and hypophisis.