**7. Acknowledgments**

I thank Dr. Eliana Nakano and Mr. Alexsander S. Souza (Laboratório de Parasitologia, Instituto Butantan, São Paulo, SP, Brazil) for assistance with confocal microscopy. I also thank Ms. Edinéia C. Moraes for drawing the lifecycle diagram and Ms. Aline A. L. Carvalho for comments and suggestions.
