[1] Univ Sao Paulo, Sch Publ Hlth, Publ Hlth Lab, Sao Paulo, Brazil
[2] Univ Sao Paulo, Sch Pharm, Sao Paulo, Brazil
[3] Univ Sao Paulo, Univ Hosp, Hosp Infect Control Comm, Sao Paulo, Brazil
[4] Univ Sao Paulo, Inst Biomed Sci, Dept Microbiol, Sao Paulo, Brazil