Study of 109 Achromobacter spp. isolates from 9 French CF centres reveals the circulation of a multiresistant clone of A. xylosoxidans belonging to ST 137

J Cyst Fibros. 2019 Nov;18(6):804-807. doi: 10.1016/j.jcf.2019.04.005. Epub 2019 May 16.


We previously reported the distribution of Achromobacter spp. (species and Sequence Types (ST)) in our French Cystic Fibrosis (CF) centre. In the present study we collected 109 Achromobacter isolates (1/patient) from 9 other French CF Centres for species identification, antimicrobial susceptibility testings and Multilocus-Sequence-Typing (MLST) analysis. Ten species were detected, A. xylosoxidans being the most predominant one (73.4% of the isolates). Piperacillin-tazobactam, ceftazidime, imipenem, meropenem and ciprofloxacin were respectively active against 88, 70, 79, 72 and 23% of the isolates. Among the 79 A. xylosoxidans isolates, 46 STs were detected. Interestingly, ST 137, recovered in 4 centres (5 patients), was previously detected in our centre (2 patients). The strains from the 7 patients belonged to the same pulsotype (pulsed-field-gel-electrophoresis analysis) and harboured acquired resistance to meropenem, ceftazidime, ciprofloxacin, and except for 2 isolates, to imipenem and piperacillin-tazobactam. This is the first description in France of a circulating multiresistant A. xylosoxidans strain.

Keywords: Achromobacter; Cystic fibrosis; Identification; MLST; Resistance; ST 137; nrdA.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Achromobacter denitrificans* / drug effects
  • Achromobacter denitrificans* / isolation & purification
  • Anti-Bacterial Agents* / classification
  • Anti-Bacterial Agents* / pharmacology
  • Cystic Fibrosis* / drug therapy
  • Cystic Fibrosis* / epidemiology
  • Cystic Fibrosis* / microbiology
  • DNA, Bacterial / isolation & purification
  • Drug Resistance, Multiple, Bacterial
  • Electrophoresis, Gel, Pulsed-Field / methods
  • France / epidemiology
  • Gram-Negative Bacterial Infections* / epidemiology
  • Gram-Negative Bacterial Infections* / microbiology
  • Humans
  • Microbial Sensitivity Tests / methods
  • Microbial Sensitivity Tests / statistics & numerical data
  • Multilocus Sequence Typing / methods


  • Anti-Bacterial Agents
  • DNA, Bacterial