Abstract
Objectives: We assess the diagnostic yield of repeat testing for C. difficile using molecular methods within 7 days of a negative test and identify specific factors associated with conversion from negative to positive test result within a 7-day period to aid in selective test utilization. Methods: A retrospective chart review of 20,866 laboratory test orders for C. difficile PCR was conducted. The test result, clinicopathologic patient features, and previous test results were recorded. Univariate and multivariate analysis was conducted to compare patients with initial and repeat negative results (n = 248) to a group of patients with conversion from negative to positive results within 7 days. Results: Univariate analysis demonstrated a history of C. difficile infection, receipt of antibiotics within 14 days, and duration of hospital stay as factors significantly different between patients with repeat negative and conversion to positive C. difficile test result. Only history of C. difficile infection was significantly different upon multivariate analysis. Conclusions: Identification of prior C. difficile infection as the only factor significantly correlated with conversion from negative to positive C. difficile test result within 7 days aids in selective test utilization and reduces the costs associated with unnecessary laboratory testing.
Original language | English (US) |
---|---|
Pages (from-to) | 307-310 |
Number of pages | 4 |
Journal | Diagnostic Microbiology and Infectious Disease |
Volume | 90 |
Issue number | 4 |
DOIs | |
State | Published - Apr 2018 |
Keywords
- Clostridium difficile
- Cost-savings
- PCR
- Test utilization
ASJC Scopus subject areas
- Microbiology (medical)
- Infectious Diseases