Direct bacterial identification from positive BacT/Alert blood cultures using MicroScan overnight and rapid panels.

Academic Article


  • Studies were conducted on a method of direct inoculation of MicroScan overnight and rapid panels from positive BacT/Alert blood culture bottles containing standard aerobic media to determine the correlation with inoculation of the corresponding panels with a standardized bacterial suspension obtained following subculture to agar. For Gram-negative organisms, 122 of 127 (96%) overnight panels and 85 of 118 (72%) rapid panels showed complete agreement with the standard method for species identification. Highest concordance (99%) occurred with Enterobacteriaceae inoculated directly into overnight panels. For Gram-positive organisms, 70 of 85 (82%) overnight panels and 45 of 86 (52%) rapid panels showed complete agreement. These findings suggest that direct inoculation of Gram-negative overnight MicroScan panels yields results most comparable to standard methods when Enterobacteriaceae are detected and allows reporting of results 18 to 24 h sooner. Direct inoculation of Gram-positive overnight or rapid panels and Gram-negative rapid panels from this blood culture medium did not yield acceptable identification results and is not recommended.
  • Authors


  • Bacteremia, Blood, Culture Media, Gram-Negative Bacteria, Gram-Positive Bacteria, Humans, Microbiological Techniques, Prospective Studies, Quality Control, Sensitivity and Specificity, Species Specificity
  • Author List

  • Waites KB; Brookings ES; Moser SA; Zimmer BL
  • Start Page

  • 21
  • End Page

  • 26
  • Volume

  • 32
  • Issue

  • 1