scholarly journals Comparison of the inoculum effect of cefoxitin and other cephalosporins and of beta-lactamase inhibitors and their penicillin-derived components on the Bacteroides fragilis group.

1991 ◽  
Vol 35 (9) ◽  
pp. 1868-1874 ◽  
Author(s):  
E J Goldstein ◽  
D M Citron ◽  
C E Cherubin
Keyword(s):  
Bacteroides Fragilis ◽  
Beta Lactamase ◽  
Bacteroides Fragilis Group ◽  
Inoculum Effect

Oligonucleotide probes for detection of cephalosporinases among Bacteroides strains.

1996 ◽  
Vol 40 (4) ◽  
pp. 1014-1016 ◽  
Author(s):  
P Mastrantonio ◽  
R Cardines ◽  
P Spigaglia
Keyword(s):  
Rapid Method ◽  
Bacteroides Fragilis ◽  
Oligonucleotide Probes ◽  
Beta Lactamase ◽  
Colony Hybridization ◽  
Bacteroides Fragilis Group

Two oligonucleotide probes selected from the sequences of cepA and cfxA genes, respectively, were used to detect beta-lactamase production among strains of the Bacteroides fragilis group. By using these probes, colony hybridization was shown to be a specific and rapid method for identifying the more prevalent beta-lactamase, CepA, and the rarer CfxA enzyme among B. fragilis strains.

Antibiotic Susceptibility of Bacteroides fragilis Group Strains in Hungary

Anaerobe ◽  
1995 ◽  
Vol 1 (5) ◽  
pp. 269-274 ◽  
Author(s):  
Elisabeth Nagy ◽  
Ildikó Szőke ◽  
Mria Gacs ◽  
Károly Csiszár
Keyword(s):  
Antibiotic Susceptibility ◽  
Bacteroides Fragilis ◽  
Bacteroides Fragilis Group

scholarly journals Prevalence of Antimicrobial Resistance among Clinical Isolates of Bacteroides fragilis Group in Canada in 2010-2011: CANWARD Surveillance Study

2011 ◽  
Vol 56 (3) ◽  
pp. 1247-1252 ◽  
Author(s):  
James A. Karlowsky ◽  
Andrew J. Walkty ◽  
Heather J. Adam ◽  
Melanie R. Baxter ◽  
Daryl J. Hoban ◽  
...  
Keyword(s):  
Antimicrobial Agents ◽  
Bacteroides Fragilis ◽  
Clinical Isolates ◽  
Surveillance Study ◽  
Content Type ◽  
Microdilution Method ◽  
Broth Microdilution Method ◽  
Amoxicillin Clavulanate ◽  
Bacteroides Fragilis Group ◽  
Bacteroides Ovatus

ABSTRACTClinical isolates of theBacteroides fragilisgroup (n= 387) were collected from patients attending nine Canadian hospitals in 2010-2011 and tested for susceptibility to 10 antimicrobial agents using the Clinical and Laboratory Standards Institute (CLSI) broth microdilution method.B. fragilis(59.9%),Bacteroides ovatus(16.3%), andBacteroides thetaiotaomicron(12.7%) accounted for ∼90% of isolates collected. Overall rates of percent susceptibility were as follows: 99.7%, metronidazole; 99.5%, piperacillin-tazobactam; 99.2%, imipenem; 97.7%, ertapenem; 92.0%, doripenem; 87.3%, amoxicillin-clavulanate; 80.9%, tigecycline; 65.9%, cefoxitin; 55.6%, moxifloxacin; and 52.2%, clindamycin. Percent susceptibility to cefoxitin, clindamycin, and moxifloxacin was lowest forB. thetaiotaomicron(n= 49, 24.5%),Parabacteroides distasonis/P. merdae(n= 11, 9.1%), andB. ovatus(n= 63, 31.8%), respectively. One isolate (B. thetaiotaomicron) was resistant to metronidazole, and two isolates (bothB. fragilis) were resistant to both piperacillin-tazobactam and imipenem. Since the last published surveillance study describing Canadian isolates ofB. fragilisgroup almost 20 years ago (A.-M. Bourgault et al., Antimicrob. Agents Chemother. 36:343–347, 1992), rates of resistance have increased for amoxicillin-clavulanate, from 0.8% (1992) to 6.2% (2010-2011), and for clindamycin, from 9% (1992) to 34.1% (2010-2011).

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