title: Morphological changes of Trypanosoma vivax in mice.
abstract: Morphological changes were observed in the blood forms of Trypanosoma vivax strain Y486 in mice on Days 12-13 of infection, following the peak parasitaemia. During this period elongate trypomastigotes, 25-40 micron long, were observed, most showing an anterior movement of the kinetoplast towards the nucleus and some having a blunt posterior end. In a few parasites a complete transformation to the epimastigote form, 40-42 micron long, was observed. Small sphaeromastigotes were also present, especially in the fine capillaries of various organs. Smears and electron microscopy suggested the presence of extra-vascular forms in the spleen.
mesh_terms: D000818:Animals; D008168:Lung / Q000469:parasitology; D051379:Mice; D013154:Spleen / Q000469:parasitology; D013997:Time Factors; D014345:Trypanosoma / Q000166:cytology*; D014353:Trypanosomiasis, African / Q000469:parasitology*