Collaborative evaluation of the Radiometer Sensititre AP80 for identification of gram-negative bacilli

Area of Science:

• Clinical Microbiology
• Medical Diagnostics
• Bacterial Identification

Background:

• Accurate identification of gram-negative bacilli is crucial in clinical microbiology.
• Automated systems offer potential for improved efficiency and accuracy in bacterial identification.

Purpose of the Study:

• To evaluate the performance of the Sensititre AP80 panel for automated identification of gram-negative bacilli.
• To assess the accuracy and efficiency of the Sensititre AP80 panel in a multicenter trial.

Main Methods:

• A multicenter trial involving 1,023 clinical isolates of gram-negative bacilli.
• Utilized the Sensititre AP80 panel read on the Sensititre AutoReader.
• Compared results with API 20E or Rapid NFT systems and conventional biochemical profiles for discrepancies.

Main Results:

• Same-day identification was achieved for 90% of isolates within 5 hours.
• High agreement rates were observed: 95.3% genus and 92.5% species for Enterobacteriaceae; 95.1% genus and 84.7% species for nonenteric organisms.
• The panel demonstrated simplicity, convenience, reproducibility, and minimal need for supplementary testing.

Conclusions:

• The Sensititre AP80 panel is a simple, convenient, and accurate automated system for identifying gram-negative bacilli.
• It is well-suited for routine use in clinical microbiology laboratories for both Enterobacteriaceae and nonenteric organisms.
• The system offers comparable accuracy to other automated methods for same-day identification.