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Exercise tolerance of control and infected rats. Infected animals were inoculated intraperitoneally with Trypanosoma cruzi Y strain (300,000 trypomastigotes/50 g body weight). TTF, total time to fatigue; W, workload. Data of 14 animals from each group were collected 9 weeks after inoculation and are expressed as mean ± SEM. *Denotes statistical difference from the Control (P < 0.001).
