1293. Factors Associated with Antibiotic Exposure in Children less than 3 Years Old Hospitalized with Bronchiolitis
Session: Poster Abstract Session: Clinical Infectious Diseases: Respiratory Infections
Friday, October 28, 2016
Room: Poster Hall
  • Abx in Bronch Poster_JP_4.pdf (6.5 MB)
  • Background: Children hospitalized with bronchiolitis, a leading cause of pediatric admissions, are frequently treated with antibiotics despite recommendations to limit their use in this viral syndrome. To inform strategies to curb antibiotic overuse in this population, we sought to identify determinants of antibiotic exposure among inpatients with bronchiolitis.

    Methods: We performed a prospective cohort study of children 29 days to 35 months old hospitalized from 2006-2010 for acute respiratory infection (ARI) in Quebec City, Canada. We collected clinical data and a nasopharyngeal aspirate for multiplex viral testing at enrollment and reviewed patient charts to record management. We assessed factors associated with antibiotic use by logistic regression.

    Results: Among 681 children admitted for ARI, 472 (69.3%) were diagnosed with bronchiolitis. We identified ≥1 respiratory virus in 435/472 (92.2%) patients, most frequently respiratory syncytial virus (RSV; 366 [77.5%]). Chest x-ray (CXR) and blood culture were performed in 450 (95.3%) and 247 (52.3%) subjects, respectively. Antibiotics were prescribed to 300/472 (63.6%) children. In a multivariate analysis, the strongest independent risk factors for antibiotic exposure were a concurrent clinical diagnosis of acute otitis media (adjusted odds ratio [aOR] 17.8; 95% CI 8.9-35.3) and pneumonia (aOR 8.4; 95% CI 2.7-25.9). Other risk factors included having a blood culture (aOR 7.6; 95% CI 4.1-14.0), fever ≥38.5 °C (aOR 3.1; 95% CI 1.7-5.7), underlying comorbidity (aOR 3.1; 95% CI 1.1-8.1), infiltrate on CXR (aOR 3.1; 95% CI 1.05-8.9), longer hospital stay in days (aOR 1.2; 95% CI 1.1-1.4), and older age (6-11 months [aOR 1.1; 95% CI 0.5-2.2]; 12-23 months [aOR 3.1; 95% CI 1.3-7.5]; 24-35 months [aOR 6.7; 95% CI 0.95-47.8]). RSV rapid test result, infecting virus, and disease severity (need for O2 therapy or intensive care) were not associated with antibiotic use.

    Conclusion: Antibiotic exposure occurred in nearly two-thirds of children admitted with bronchiolitis, almost all of whom had an identifiable viral etiology. More reliable methods to diagnose concurrent bacterial pneumonia and otitis could greatly reduce unnecessary antibiotic use in bronchiolitis hospitalizations.

    Katherine Backman, MD1, Chelsea Caya, MScPH2, Gaston De Serres, MD3, Julie Carbonneau, MSc4, Marie-Eve Hamelin, PhD4, Guy Boivin, MD, MSc4 and Jesse Papenburg, MD, MSc2, (1)McGill University, Montreal, QC, Canada, (2)McGill University Health Centre Research Institute, Montreal, QC, Canada, (3)Institut national de santé publique du Québec, Quebec City, QC, Canada, (4)Laval University, Quebec City, QC, Canada


    K. Backman, None

    C. Caya, None

    G. De Serres, None

    J. Carbonneau, None

    M. E. Hamelin, None

    G. Boivin, BioCryst: Investigator , Research grant
    Merck: Investigator , Research grant

    J. Papenburg, Becton, Dickenson & Co.: Investigator , Research grant
    RPS Diagnostics: Scientific Advisor , n/a
    AbbVie: Scientific Advisor , n/a

    Findings in the abstracts are embargoed until 12:01 a.m. CDT, Wednesday Oct. 26th with the exception of research findings presented at the IDWeek press conferences.