title: Experimental immunity against trypanosomiasis.
abstract: 9 groups of 6 female rats were used in an experiment using fraction 3 of Trypanosoma rhodesiense. 500 microgram gave 100% immunoprotection and 1000 and 1500 microgram gave 66% immunoprotection when challenged with 5 X 10(2) T.brucei. 2  groups of 10 female rats were tested for a short period inoculation immune response. In this, 750 microgram of fraction 3 of T.rhodesiense gave 70% immunoprotection when challenged with T.brucei.
mesh_terms: D000818:Animals; D005260:Female; D007114:Immunization; D051381:Rats; D014345:Trypanosoma / Q000276:immunology*; D014346:Trypanosoma brucei brucei / Q000276:immunology; D014353:Trypanosomiasis, African / Q000517:prevention & control*