Prevalence of human cystic echinococcosis in the towns of Ñorquinco and Ramos Mexia in Rio Negro Province, Argentina, and direct risk factors for infection oleh Leonardo Uchiumi, Guillermo Mujica, Daniel Araya, Juan Carlos Salvitti, Mariano Sobrino, Sergio Moguillansky, Alejandro Solari, Patricia Blanco, Fabiana Barrera, Janete Lamunier, Marcos Arezo, Marcos Seleiman, Zaida E. Yadon, Francesca Tamarozzi, Adriano Casulli, Edmundo Larrieu