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Background   Acinetobacter baumannii  is an increasingly worrying organism in the healthcare setting, due to its multidrug resistance and persistence. Prolonged hospitalisation, immunocompromised patients and excessive antibiotic exposure all contribute to increasing the risk of  A. baumannii  infections, which makes cancer patients a significant risk group. This study aims to investigate the dissemination of  A. baumannii  at the National Cancer Institute (NCI) in Cairo – Egypt.    Methods  All bacterial isolates were typed using Multi-locus Sequence Typing (MLST) to characterise the epidemiology of isolates. The intrinsic OXA-51-like, and the acquired carbapanemases OXA-23, − 24/40, − 58, NDM, IMP, and VIM were also amplified and sequenced to genetically identify mechanisms of carbapenem resistance.    Results  MLST results show a high degree of multi-clonal dissemination, with 18 different Sequence Types (STs) identified, including 5 novel. The majority of isolates belonged to International Clone (IC) 2, and carbapenem resistance was detected in 93% of isolates and mediated by  bla  OXA-23 ,  bla  OXA-58 ,  bla  NDM-1  and  bla  VIM-1 . We also report the presence of a resistant ST732 (OXA-378) which has been previously identified in migratory birds .Conclusions  Multiple highly resistant clones were identified in a Cancer hospital in Cairo. It is vital that clinicians and healthcare workers are aware of the population of  A. baumannii  present in order to have appropriate treatment and infection control practices.

Multiple sequence types responsible for healthcare-associated Acinetobacter baumannii dissemination in a single centre in Egypt