[1] Univ Autonoma Nuevo Leon, Fac Med, Dept Microbiol, Colonia Mitras Ctr, Monterrey 64460, NL, Mexico
[2] Univ Autonoma Nuevo Leon, Fac Med, Hosp Univ, Monterrey 64460, NL, Mexico
[3] Inst Politecn Nacl, Ctr Biotecnol Genom, Lab Med Conservac, Reynosa, Tamaulipas, Mexico