Accession Number:

ADA620305

Title:

Clinical Infectious Outcomes Associated with Biofilm-related Infections: a Retrospective Chart Review

Descriptive Note:

Journal article

Corporate Author:

ARMY INST OF SURGICAL RESEARCH FORT SAM HOUSTON TX

Report Date:

2015-06-07

Pagination or Media Count:

8.0

Abstract:

Biofilms are associated with persistent infection. Reports characterizing clinical infectious outcomes and patient risk factors for colonization or infection with biofilm forming isolates are scarce. Our institution recently published a study examining the biofilm forming ability of 205 randomly selected clinical isolates. This present study aims to identify potential risk factors associated with these isolates and assess clinical infectious outcomes. 221 clinical isolates collected from 2005 to 2012 and previously characterized for biofilm formation were studied. Clinical information from the associated patients, including demographics, comorbidities, antibiotic usage, laboratory values, and clinical infectious outcomes, was determined retrospectively through chart review. Duplicate isolates and non-clinical isolates were excluded from analysis. Associations with biofilm forming isolates were determined by univariate analysis and multivariate analysis. 187 isolates in 144 patients were identified for analysis 113 were biofilm producers and 74 were not biofilm producers. Patients were primarily male 78 military members 61 with combat trauma 52 . On multivariate analysis, the presence of methicillin-resistant Staphylococcus aureus p less than 0.01, OR 5.09, 95 CI 1.12, 23.1 and Pseudomonas aeruginosa p 0.02, OR 3.73, 95 CI 1.46, 9.53 were the only characteristics more likely to be present in the biofilm producing isolate group. Infectious outcomes of patients with non-biofilm forming isolates, including cure, relapsereinfection, and chronic infection, were similar to infectious outcomes of patients with biofilm-forming isolates. Mortality with initial infection was higher in the biofilm producing isolate group 16 vs 5 , p 0.01 but attributable mortality was low 1 of 14. No characteristics examined in this study were found to be associated with relapsereinfection or chronic infection on multivariate analysis.

Subject Categories:

  • Anatomy and Physiology
  • Medicine and Medical Research
  • Microbiology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE