Taking for garanted the sensivity of the Quantitative Buffy Coat (QBC) system, as documented in a murine esperimental model, we essayed to detect Trypanosoma cruzi in the peripheral blood of 100 patients with Chagas' disease in its chronic phase. By means of the method, no positivity ocurred, evently as a consequence of small parasitemias, undetectable by this technique as assessed by the cases in consideration.
Chagas' disease; Parasitologic diagnosis; Quantitative Buffy Coat (QBC)