Evolution, control and success of combination therapy with Ampicilin-sulbactam/Ceftazidime-Avibactam during a Carbapenem-Resistant Acinetobacter baumannii outbreak in burn Intensive Care Unit

Eur J Clin Microbiol Infect Dis. 2024 Jul;43(7):1453-1459. doi: 10.1007/s10096-024-04840-9. Epub 2024 Apr 27.

Abstract

We present our findings on interpatient transmission, epidemic control measures, and the outcomes of a series of ten critically ill burn patients who were either colonized or infected with carbapenem-resistant Acinetobacter baumannii (CRAB). None of the five infected patients achieved clinical cure, and all experienced relapses. Microbiological failure was observed in 40% of the infected patients. The isolated CRAB strains were found to carry blaOXA-23 and armA resistance genes. Despite the lack of clinical cure, all five infected patients survived and were discharged from the Burn Intensive Care Unit.

Keywords: Ampicillin-sulbactam; Antibiotic resistance; Burn; Carbapenem-resistant Acinetobacter baumannii; Cefiderocol; Outbreak; Whole-genome sequencing.

MeSH terms

  • Acinetobacter Infections* / drug therapy
  • Acinetobacter Infections* / epidemiology
  • Acinetobacter Infections* / microbiology
  • Acinetobacter baumannii* / drug effects
  • Acinetobacter baumannii* / genetics
  • Acinetobacter baumannii* / isolation & purification
  • Adult
  • Aged
  • Anti-Bacterial Agents* / pharmacology
  • Anti-Bacterial Agents* / therapeutic use
  • Azabicyclo Compounds* / pharmacology
  • Azabicyclo Compounds* / therapeutic use
  • Burn Units
  • Burns / complications
  • Burns / microbiology
  • Carbapenems* / pharmacology
  • Carbapenems* / therapeutic use
  • Ceftazidime* / pharmacology
  • Ceftazidime* / therapeutic use
  • Cross Infection / drug therapy
  • Cross Infection / epidemiology
  • Cross Infection / microbiology
  • Disease Outbreaks*
  • Drug Combinations*
  • Drug Resistance, Multiple, Bacterial / genetics
  • Drug Therapy, Combination
  • Female
  • Humans
  • Intensive Care Units*
  • Male
  • Middle Aged
  • Sulbactam* / pharmacology
  • Sulbactam* / therapeutic use
  • Treatment Outcome
  • beta-Lactamases / genetics

Substances

  • Anti-Bacterial Agents
  • Azabicyclo Compounds
  • Sulbactam
  • Drug Combinations
  • Carbapenems
  • Ceftazidime
  • avibactam, ceftazidime drug combination
  • beta-Lactamases