Performance of an indigenous ?-mercaptoethanol-modified antigen in comparison with a commercial reference in direct agglutination test for detection of canine visceral leishmaniasis - Semião-Santos, Saul; Veloso, Laura; Andrade, Paulo; Melo, Márcia; Martins, Luís; Marinho, Artur; Almeida, José; Campino, Lénea; Harith, Abdallah (2013)