Correa Valencia, N.M., Ramírez, N.F., Bülte M. and Fernández Silva, J.A. 2017. Fecal culture and two fecal-PCR methods for the diagnosis of Mycobacterium avium subsp. paratuberculosis in a seropositive herd. Revista Colombiana de Ciencias Pecuarias. 30, 2 (Apr. 2017), 101–115. DOI:https://doi.org/10.17533/udea.rccp.v30n2a02.