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Chagasic patients exhibit a higher number and frequency of nitric oxide-producing leukocytes. (A) Percentage and (B) absolute number of nitric oxide (NO)-producing leukocytes from chagasic patients (n = 15) and non-chagasic donors (n = 19). (C) Mean fluorescence intensity of NO in leukocytes from chagasic patients (n = 11) and non-chagasic donors (n = 20). (D) Serum nitric oxide levels in seropositive patients (n = 14) and seronegative donors (n = 14) (*p < 0.05 and **p < 0.01).
