Diagnosing Clostridioides difficile infections with molecular diagnostics: multicenter evaluation of revogene C. difficile assay

Eur J Clin Microbiol Infect Dis. 2020 Jun;39(6):1169-1175. doi: 10.1007/s10096-020-03829-4. Epub 2020 Feb 15.

Abstract

Clostridioides difficile infections are a significant threat to our healthcare system, and rapid and accurate diagnostics are crucial to implement the necessary infection prevention and control measurements. Nucleic acid amplification tests are such reliable diagnostic tools for the detection of toxigenic Clostridioides difficile strains directly from stool specimens. In this multicenter evaluation, we determined the performance of the revogene C. difficile assay. The analysis was conducted on prospective stool specimens collected from six different sites in Europe. The performance of the revogene C. difficile assay was compared to the different routine diagnostic methods and, for a subset of the specimens, against toxigenic culture. In total, 2621 valid stool specimens were tested, and the revogene C. difficile assay displayed a sensitivity/specificity of 97.1% [93.3-99.0] and 98.9% [98.5-99.3] for identification of Clostridioides difficile infection. Discrepancy analysis using additional methods improved this performance to 98.8% [95.8-99.9] and 99.6% [99.2-99.8], respectively. In comparison to toxigenic culture, the revogene C. difficile assay displayed a sensitivity/specificity of 93.0% [86.1-97.1] and 99.5% [98.7-99.9], respectively. These results indicate that the revogene C. difficile assay is a robust and reliable aid in the diagnosis of Clostridioides difficile infections.

Publication types

  • Evaluation Study
  • Multicenter Study

MeSH terms

  • Bacterial Proteins / genetics
  • Bacterial Toxins / genetics
  • Clostridioides difficile / genetics
  • Clostridioides difficile / isolation & purification*
  • Clostridium Infections / diagnosis*
  • Diagnostic Tests, Routine
  • Europe
  • Feces / microbiology
  • Humans
  • Molecular Diagnostic Techniques / methods*
  • Nucleic Acid Amplification Techniques
  • Point-of-Care Testing
  • Prospective Studies
  • Sensitivity and Specificity

Substances

  • Bacterial Proteins
  • Bacterial Toxins
  • toxB protein, Clostridium difficile