Clinical characteristics and outcomes of community and hospital-acquired Acinetobacter baumannii bacteremia

Sarunyou Chusri, Virasakdi Chongsuvivatwong, Kachornsakdi Silpapojakul, Kamonnut Singkhamanan, Thanaporn Hortiwakul, Boonsri Charernmak, Yohei Doi

研究成果: ジャーナルへの寄稿学術論文査読

29 被引用数 (Scopus)


Purpose: We aimed to characterize clinical manifestations of the patients with bacteremia due to community-acquired Acinetobacter baumannii and evaluate the outcomes of these patients. Methods: We conducted a retrospective study to include adult patients with A. baumannii bacteremia and then classified them into two groups: community-acquired A. baumannii bacteremia and hospital-acquired A. baumannii bacteremia. Characteristics and outcomes between 2 groups were compared. The Galleria mellonella infection survival model was used to determine the virulence of A. baumannii in these 2 groups. Results: There were 63 patients with A. baumannii bacteremia: 21 patients with community-acquired (CA) bacteremia and 42 patients with hospital-acquired (HA) bacteremia. Three patients with CA bacteremia were excluded due to healthcare-associated risks of infection. The remaining 18 patients with CA bacteremia had carbapenem-susceptible A. baumannii (CA-CSAB). Among the 42 patients with HA bacteremia, 11 patients had carbapenem-susceptible A. baumannii (HA-CSAB) and 31 patients had carbapenem-resistant A. baumannii (HA-CRAB). The 30-day mortality rates of those with CA-CSAB did not differ from those with HA-CSAB bacteremia but were significantly lower than those with HA-CRAB (p = 0.003). The factors influencing 30-day mortality were infection with CRAB (p = 0.004), appropriate empirical antimicrobial therapy (p = 0.002), and higher Acute Physiology and Chronic Health Evaluation II score (p < 0.001). The G. mellonella assay showed no differences in survival rates among CA-CSAB, HA-CSAB, and HA-CRAB. Conclusions: Patients with bacteremia due to CA-CSAB and HA-CSAB had similar outcomes. Similar virulences of CA-CSAB and HA-CSAB were confirmed with the G. mellonella infection model.

ジャーナルJournal of Microbiology, Immunology and Infection
出版ステータス出版済み - 10-2019

All Science Journal Classification (ASJC) codes

  • 免疫アレルギー学
  • 免疫学および微生物学一般
  • 微生物学(医療)
  • 感染症


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