[1] Hosp Moinhos Vento, Infect Control Serv, Porto Alegre, Brazil
[2] Weinmann Lab, Fleury Grp, Porto Alegre, Brazil
[3] Univ Sao Paulo, Sch Pharm, Antimicrobial Resistanceand Clin Microbiol Lab, Sao Paulo, SP, Brazil
[4] Univ Federal Rio Grande Sul, Dept Internal Med, Porto Alegre, Brazil