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Effect of vitamin B12 and Bnz on the treatment of infected mice. Parasitemia levels (A) and survival curve (B) during the acute infection period in C3H mice infected with 5 × 103 bloodstream trypomastigotes of T. cruzi. Mice were treated from days 5 to 10 and 12 to 17 of infection. Parasitemia was determined by counting the number of trypomastigotes in 5 μl of fresh blood collected from the tail every other day. Mortality was recorded every day.
