[1] Univ Nis, Fac Med, Zorana Dindica 50, Nish 18000, Serbia
[2] Inst Publ Hlth Nis, Ctr Microbiol, Natl Reference Lab Anaerob Infect Clostridium Dif, Nish 18000, Serbia
[3] Leiden Univ, Med Ctr, Natl Inst Publ Hlth & Environm, Dept Med Microbiol,Ctr Infect Dis,Natl Reference, POB 9600, NL-2300 RC Leiden, Netherlands
[4] Univ Nis, Fac Sci & Math, Dept Chem, Visegradska 33, Nish 18000, Serbia