Aggravation of trypanosoma cruzi infection mediated by t cell blast with a th2 lymphokine profile - Barbosa de Oliveira, L C; Curotto de Lafaille, M A; Lima, Glória Maria Collet de Araujo; Abrahamsohn, Ises de Almeida (Congresso da Associação Latino-Americana de Imunologia, 1990)