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Munier, Anne-Lise; Biard, Lucie; Legrand, Matthieu; Rousseau, Clotilde; Lafaurie, Matthieu; Donay, Jean-Luc; Flicoteaux, Rémi; Mebazaa, Alexandre; Mimoun, Maurice; Molina, Jean-Michel
International journal of infectious diseases, 02/2019, Volume: 79Journal Article
•We report and analyse all multi-resistant Acinetobacter baumannii (MR-AB) infections in patients hospitalized in a burn unit from April to November 2014 in a prospective observational study.•We found that among 86 patients admitted to the ward, 15 acquired MR-AB nosocomial infection with a median time of 22 days.•Risk factors for MR-AB infection were SAPS II and ABSI scores, MR-AB colonization, invasive procedures and ≥2 skin grafts.•MR-AB infection was associated with an increased risk of death and a longer hospital stay.•Surveillance cultures should be performed to identify colonized patients in whom the risk of MR-AB infection is widely increased.•As it seems difficult to limit the number of skin grafts or invasive procedures needed to manage severely burned patients, prevention of MR-AB colonization remains critical.•This study is, to our knowledge, the first prospective study on the subject, which is a great asset. Multidrug-Resistant Acinetobacter baumannii (MR-AB) can cause outbreaks in burn units. We aimed to study the incidence, risk factors and outcome of MR-AB infections in a burn unit (BU). A prospective study was conducted from April to November, 2014 during an outbreak in a BU in Paris. Weekly surveillance cultures were performed to determine MR-AB colonization. MR-AB nosocomial infections, discharge or death without MR-AB infection were considered as competing events. To identify risk factors for MR-AB infection, baseline characteristics and time-dependent variables were investigated in univariate analyses using Cox models. Eighty-six patients admissions were analyzed during the study period. Among them, 15 (17%) acquired MR-AB nosocomial infection. Median time to infection was 22days (interquartile range: 10–26 days). Cumulative incidence of MR-AB infections was 15% at 28days (95% CI=8–24). Risk factors for MR-AB infection in univariate analysis were SAPS II (Hazard Ratio (HR):1.08; 95% CI:1.05–1.12; P<0.0001) and ABSI (Abbreviated Burn Severity Index) scores (HR:1.32; 95% CI:1.12–1.56; P=0.001), MR-AB colonization (HR:10.2; 95%CI:2.05–50.3; P=0.004), invasive procedures (ventilation, arterial and/or venous catheter) (P=0.0001) and ≥2 skin grafts (HR:10.2; 95% CI:1.76–59.6; P=0.010). MR-AB infection was associated with an increased risk of death (HR: 7.11; 95%CI: 1.52–33.2; P=0.013) and longer hospital stay with a median estimated increase of 10days (IQR: 6; 14). Incidence of MR-AB nosocomial infection was high during this outbreak, and was associated with prolonged hospitalization and increased risk of death. High patient severity scores, prior MR-AB colonization, invasive procedures and repeated skin grafts were associated with an increased risk of nosocomial infection.
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