Epidemiology and outcome of anaerobic bacteremia in a tertiary hospital

医学 菌血症 内科学 败血症 肾脏疾病 流行病学 入射(几何) 回顾性队列研究 厌氧菌 外科 抗生素 重症监护医学 微生物学 物理 遗传学 光学 细菌 生物
作者
Yasmin Zouggari,Christophe Lelubre,Salah Eddine Lali,Soraya Cherifi
出处
期刊:European Journal of Internal Medicine [Elsevier BV]
卷期号:105: 63-68 被引量:14
标识
DOI:10.1016/j.ejim.2022.08.024
摘要

Despite a low incidence, anaerobic bacteremia remains a serious and often underestimated condition. This retrospective study aims to describe the epidemiology of anaerobic bacteremia and to identify risk factors affecting mortality and the impact of treatment. We included all positive anaerobic blood cultures from January 2018 to December 2019 at the University Hospital of Charleroi (Belgium). We identified 105 episodes of clinically significant anaerobic bacteremia (mean age of patients: 66.4 +/- 16.8 years). The main comorbidities were hypertension, chronic kidney disease, and diabetes. Bacteremia was community-acquired in 70.5% of the episodes. Two thirds of the blood cultures were mono-microbial, and the commonest bacteria found were Bacteroides fragilis group (31.4%), Fusobacterium spp. (17.1%) and Clostridium spp. (15.2%). The main sources of bacteremia were abdominal (35.2%), urinary (17.1%), osteoarticular (14.2%) and pulmonary (12.3%). Surgery within 30 days before hospitalization was more frequent in patients with nosocomial bacteremia (45.2% vs 2.7%, p < 0.0001). An appropriate empirical antibiotic therapy was initiated in 74.7% of patients, and the median duration of antibiotic therapy was 10 [5 - 15] days. One third of patients had a surgical management. Patients who did not survive at day 30 (n = 23 [21.9%]) had significantly lower time to positivity (TTP) values than patients alive at day 30, presented more often with sepsis, had higher Charlson scores and chronic kidney disease, and were more likely to suffer from Clostridium spp. bacteremia. In a Cox proportional hazard analysis, sepsis (OR: 7.32 [95% CI: 2.83- 18.97], p< 0.0001) was identified as an independent risk factors for 30-day mortality, whereas time to positivity ≥ 30 h (OR: 0.24 [95% CI: 0.07 - 0.84], p = 0.025) and an adequate empirical antibiotic therapy (OR: 0.37 [95% CI: 0.15 - 0.94], p = 0.037) were associated with better outcomes. Anaerobic bacteremia has a high mortality rate which justifies the maintenance of empirical antibiotic therapy.
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