Vaccination of Callithrix jacchus (Linné, 1758) marmosets with the PF strain of Trypanosoma cruzi

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Abstract
Callithrix jacchus marmosets, vaccinated more than once with high doses of the PF strain of Trypanosoma cruzi, showed a certain degree of parasitemia related to the number of parasites injected. Thirty days after vaccination, all animals were alive and showed no apparent morbid symptoms. The relationship between the dose of injected trypanosomes and the observed parasitemias is discussed and analysed as well as the immunologic incompetence of the experimental animals used.