The identification and sensitivity to antibiotics of clostridia, including Clostridia difficile isolated under infectious complications in oncologic patients
The 76 strains of Clostridium related to 14 species including 28 strains of C.difficile, were isolated from 74 samples of biological material taken out of oncologic patients. The species identification of strains was implemented by MALDI-TOF mass spectrometry using technique of direct application without extraction. The 74 strains (97.4°%) were identified up to specie with reliability evaluation 2.0-2.5. Among C.non-difficile the most frequently were separated C.perfringens (42°%), group of C.clostridioforme (24°%). The sensitivity of separated strains to anti-microbial preparations was established with E-tests technique. The different species of Clostridia had different sensitivity to antibiotics. The strains C.perfringens are sensitive to all testing antibiotics whereas species related to group C.clostridioforme are resistant to fluoroquinolones (100%), penicillin (67%). The resistance to fluoroquinolones was observed in C.scindens, C.ramosum, C.symbiosum. The strains C.scindens, C.tertium are resistant to penicillin. Among C.difficile, 93% of strains were resistant to penicillin, 57% - to imipenem and 100& - to fluoroquinolones.