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Antigenic bands in urine samples of pigs infected with Trypanosoma cruzi. Bands were detected by western blot using a polyclonal antibody against excretory–secretory trypomastigote T. cruzi. Bands under 70 kDa were not specific. (1) Urine sample from no infected pig. (2 and 3) Urine samples from infected pig at 55 and 150 days postinoculation, respectively. MW = molecular weight marker in kilodalton (kDa).
