Kinetics of S. venezuelensis infection following single (one subcutaneous inoculation of 1,500 L3 larvae) or multiple (five subcutaneous inoculations of 1,500 L3 larvae, 1 week apart) infections in rats. Shown are numbers of parasite larvae from lung (A), worms from small intestine (B), and eggs recovered from feces (C) at 2, 5, 7, 12, and 20 days after single infection or after the last infection of the multiple-infection rats. Each value represents mean ± standard error of the mean of five rats in each group. The experiment was repeated three times with similar results.