title: Prevalence and antibiotic susceptibility of Bacteroides fragilis group isolated from stool samples in North Lebanon.
abstract: 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 chloramphenicol 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).
authors: Health and Environmental Microbiology Laboratory, AZM Centre for Research in Biotechnology and its Application, Doctoral School, Lebanese University, Tripoli, Lebanon.
authors: Mariam
authors: M
authors: Yehya
authors: Health and Environmental Microbiology Laboratory, AZM Centre for Research in Biotechnology and its Application, Doctoral School, Lebanese University, Tripoli, Lebanon. ; Faculty of Public Health, Section 3, Lebanese University, Tripoli, Lebanon.
authors: Monzer
authors: M
authors: Hamze
authors: Health and Environmental Microbiology Laboratory, AZM Centre for Research in Biotechnology and its Application, Doctoral School, Lebanese University, Tripoli, Lebanon. ; Faculty of Public Health, Section 3, Lebanese University, Tripoli, Lebanon.
authors: Hassan
authors: H
authors: Mallat
authors: Health and Environmental Microbiology Laboratory, AZM Centre for Research in Biotechnology and its Application, Doctoral School, Lebanese University, Tripoli, Lebanon. ; Faculty of Public Health, Section 3, Lebanese University, Tripoli, Lebanon.
authors: Fouad
authors: F
authors: Dabbousi
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D001441:Bacteroides fragilis / Q000145:classification / Q000187:drug effects* / Q000302:isolation & purification*; D002648:Child; D002675:Child, Preschool; D024881:Drug Resistance, Bacterial; D005243:Feces / Q000382:microbiology*; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007861:Lebanon / Q000453:epidemiology; D008297:Male; D008826:Microbial Sensitivity Tests; D008875:Middle Aged; D015995:Prevalence; D055815:Young Adult
chemical_list: D000900:Anti-Bacterial Agents
keywords: Bacteroides fragilis group; anaerobic bacteria; antibiotics susceptibility