The authors would like to make the following changes.

(1) In the Results Section 3.3. Vectorial Analysis of Parasites Trajectories, third paragraph, the sentence: this behavior was clearly observed when speed and rotational angle were analyzed together (Figure 7) should be replaced by the following sentence: this behavior was clearly observed in the parasite trajectories, like the one pictured in Figure 7.

(2) The legend of Figure 7, Figure 7: Analysis of parasite trajectory. The trajectory of free-swimming epimastigotes was determined using the speed and rotational angle results form a 10-second recording. The histogram is representative of the average behavior of 20 randomly selected epimastigotes, should be replaced by Figure 7: Analysis of a single parasite trajectory. The trajectory of a typical free-swimming epimastigote was recorded for 10 seconds.

(3) Figure 7 that is in the original paper should be replaced by the following figure.