Highly discordant serology against Trypanosoma cruzi in central Veracruz, Mexico: role of the antigen used for diagnostic oleh Daniel Guzmán-Gómez, Aracely López-Monteon, María de la Soledad Lagunes-Castro, Carolina Álvarez-Martínez, Manuel Jesús Hernández-Lutzon, Eric Dumonteil, Angel Ramos-Ligonio