Prevalence and antibiotic susceptibility of Bacteroides fragilis group isolated from stool samples in North Lebanon

Brazilian Journal of Microbiology

Mariam Yehya¹  Monzer Hamze¹  Hassan Mallat¹  Fouad Dabbousi¹ 

[1] ,Lebanese University Doctoral School AZM Centre for Research in Biotechnology and its ApplicationTripoli,Lebanon

关键词: Bacteroides fragilis group;    anaerobic bacteria;    antibiotics susceptibility;   

DOI  :  10.1590/S1517-83822013000300022

来源: SciELO

【 摘 要 】

Fifty one strains of the Bacteroides fragilis group were isolated from 45 fecal samples. Classical phenotypic identification showed that 16 isolates were B. thetaiotaomicron, 12 B. uniformis, 9 B. eggerthii,7 B. vulgatus,3 B. caccae,2 Parabacteroides distasonis with 1 identified B. ovatus and 1 B. fragilis. The 51 strains were tested for susceptibility against 16 antimicrobial agents and the MICs for metronidazole were determined. The tests showed that imipenem, meropenem and chloram-phenicol were the most effective antibiotics (98%, 98% and 92.16% of susceptibility, respectively) followed by ticarcillin/clavulanic acid, piperacillin/tazobactam, rifampin (88.24% susceptibility), moxifloxacin 86.27% and tigecycline 84.31%. Ofloxacin and cefotaxime were the least effective antibiotics with 27.45% and 0% of activity respectively. Only six of the 51 isolated strains were resistant to metronidazole with MICs = 64 mg/L (1 strain) and > 256 mg/L (5 strains).

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