Molecular and morphological studies of brazilian trypanosoma evansi stocks; total absence of kDNA of trypanosomes from both laboratory stocks and naturally infected domestic and wild mammals - Ventura, Rogeria Maria; Tanaka, Carmen Silvia de Almeida; Silva, Roberto Aguilar M. S.; Nunes, Vania L.; Takeda, G. F.; Teixeira, Marta Maria Geraldes (Journal Parasitology, 2000)