Fourth Belgian multicentre survey of antibiotic susceptibility of anaerobic bacteria

Ingrid Wybo, Dorien Van den Bossche, Oriane Soetens, Evilien Vekens, Kristof Vandoorslaer, Geert Claeys, Youri Glupczynski, Margareta Ieven, Pierrette Melin, Claire Nonhoff, Hector Rodriguez-Villalobos, Jan Verhaegen, Denis Piérard

Onderzoeksoutput: Article

60 Citaten (Scopus)


OBJECTIVES: To collect recent data on the susceptibility of anaerobes to antimicrobial agents with known activity against anaerobes, and to compare them with results from previous Belgian multicentre studies.

METHODS: Four hundred and three strict anaerobic clinical isolates were prospectively collected from February 2011 to April 2012 in eight Belgian university hospitals. MICs were determined by one central laboratory for 11 antimicrobial agents using Etest methodology.

RESULTS: According to EUCAST breakpoints, >90% of isolates were susceptible to amoxicillin/clavulanate (94%), piperacillin/tazobactam (91%), meropenem (96%), metronidazole (92%) and chloramphenicol (98%), but only 70% and 40% to clindamycin and penicillin, respectively. At CLSI recommended breakpoints, only 71% were susceptible to moxifloxacin and 79% to cefoxitin. MIC50/MIC90 values for linezolid and for tigecycline were 1/4 and 0.5/4 mg/L, respectively. When compared with survey data from 2004, no major differences in susceptibility profiles were noticed. However, the susceptibility of Prevotella spp. and other Gram-negative bacilli to clindamycin decreased from 91% in 1993-94 and 82% in 2004 to 69% in this survey. Furthermore, the susceptibility of clostridia to moxifloxacin decreased from 88% in 2004 to 66% in 2011-12 and that of fusobacteria from 90% to 71%.

CONCLUSIONS: Compared with previous surveys, little evolution was seen in susceptibility, except a decline in activity of clindamycin against Prevotella spp. and other Gram-negative bacteria, and of moxifloxacin against clostridia. Since resistance was detected to all antibiotics, susceptibility testing of anaerobic isolates is indicated in severe infections to confirm appropriateness of antimicrobial therapy.

Originele taal-2English
Pagina's (van-tot)155-161
Aantal pagina's7
TijdschriftJournal of Antimicrobial Chemotherapy
Nummer van het tijdschrift1
StatusPublished - jan 2014


Duik in de onderzoeksthema's van 'Fourth Belgian multicentre survey of antibiotic susceptibility of anaerobic bacteria'. Samen vormen ze een unieke vingerafdruk.

Citeer dit