HERNÁNDEZ, J., MACÍAS, M.J., OSORIO, F., PINELLI SAAVEDRA, A., REYES LEYVA, J. and YEPIZ PLASCENCIA, G. 2009. Isolation and characterization of the gene ORF5 of porcine reproductive and respiratory syndrome (PRRS) virus in Mexico. Veterinaria México OA. 37, 002 (Oct. 2009).