In the Acknowledgments section, an antibody donation has been left out, so it should be disclosed. It is corrected as follows.

Acknowledgments

Financial support was provided by Grant no. IN 214011-3 from the Programa de Apoyo a Proyectos de Innovación Tecnológica, Dirección General de Asuntos del Personal Académico, UNAM. The publication costs of this paper were paid by RedFarmed-CONACYT. R. Hernández-Bello has a postdoctoral fellowship from the Instituto de Ciencia y Tecnología del Distrito Federal (ICyT) and from Red Farmed-CONACYT. K. Nava-Castro has a postdoctoral fellowship from Dirección General de Asuntos del Personal Académico. The T. spiralis strain and the anti-caveolin antibody were kindly provided by Dr. Guadalupe Ortega-Pierres, from Departamento de Genetica y Biología Molecular, CINVESTAV, IPN.