In vitro effect of the hydroalcoholic and ethanolic extracts of papaya seeds (Carica papaya) against Haemonchus contortus Autor Marroquín-Tun, María de los Ángeles, Higuera-Piedrahita, Rosa Isabel, López-Arellano, María Eugenia, López-Arellano, Raquel, de la Cruz-Cruz, Héctor Alejandro, Silva-Mendoza, Rocío, Cuéllar-Ordaz, Jorge Alfredo