[1] Univ Chile, Fac Med, Programa Microbiol & Micol, Inst Ciencias Biomed, Santiago 8380453, Chile
[2] Univ Chile, Fac Med, Inst Milenio Inmunol & Inmunoterapia, Santiago 8380453, Chile
[3] Univ Bernardo OHiggins, Ctr Integrat Biol & Quim Aplicada CIBQA, Santiago 8320000, Chile
[4] Univ Buenos Aires, Fac Ciencias Vet, Inst Invest Epidemiol Vet, Catedra Microbiol, C1427CWO, Buenos Aires, Argentina
[5] Univ Concepcion, Fac Ciencias Biol, Dept Microbiol, Concepcion 4070386, Chile