Abstract
Incidental observation of a discrepancy in identification of Vibrio cholerae prompted a study to understand the ability of an automated microbial identification system to identify this important pathogen. Twenty clinical isolates of V. cholerae showing difference in genetic profiles by random amplified polymorphic DNA (RAPD) fingerprinting, serologically confirmed as O1, and showing presence of ctxA and tcpA genes in PCR were subjected to analysis by Vitek 2 Compact automated identification system for identification. Vitek 2 Compact detected 10 of 20 isolates correctly, whereas the remaining 10 were identified as various members of Aeromonadaceae and Enterobacteriaceae. Our results indicate that Vitek 2 Compact automated microbial system does not always identify V. cholerae strains correctly. These observations should create awareness among end users about possible misidentifications by automated systems and encourage simultaneous use of serology and/or PCR for correct identification at least for V. cholerae, which is one of the most important enteric pathogens.
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