Comparison of Micro-ID and API 20E systems for identification of Enterobacteriaceae

Abstract
The Micro-ID 4 h identification system for Enterobacteriaceae was compared to the API 20E overnight method using 230 fresh clinical isolates and 74 stock cultures. Agreement was 97.8% for the clinical isolates and 93.2% for the stock cultures. Of primary culture plates containing gram-negative rods, 87% yielded sufficient growth to perform the 4 h Micro-ID identification on the same day the organisms were isolated.