Candida albicans masquerading as gram-negative bacilli in the clinical laboratory.

We report misidentification of Candida albicans as Gram-negative bacilli owing to colony morphology on MacConkey agar and subsequent inoculation into GN-ID/VITEK-2. ATCC and clinical Candida strains (n=24) masqueraded as various bacterial species when experimentally inoculated into GN-ID cards. This phenomenon should be considered when peculiar taxa or susceptibility are encountered.