Nosocomial pneumonia caused by a glucose-metabolizing strain of Neisseria cinerea

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Abstract
What appears to be the 1st reported case of nosocomial pneumonia caused by N. cinerea is described here. The isolate metabolized glucose when tested in BACTEC Neisseria Differentiation Kits but did not produce detectable acid in cystine-Trypticase agar medium or in modified oxidation-fermentation medium. Clinical laboratories that rely on the BACTEC method for differentiation of pathogenic Neisseriae should be aware of the fact that N. cinerea may mimic N. gonorrhoeae when tested in BACTEC Neisseria Differentiation kits. The ability of N. cinerea to grow well on tryptic soy and Mueller-Hinton agars and its inability to grow on modified Thayer-Martin medium are characteristics which help to distinguish N. cinerea from N. gonorrhoeae.