A CSF specimen is planted on routine microbiological media,…

A CSF specimen is planted on routine microbiological media, incubated at 350C in CO2 and examined after 24 hours.  Consider these results:Chocolate agar: few smallish, grayish colorless coloniesMacConkey agar:  no growth5% sheep BAP:  no growthGram stain:  gram-negative coccobacilli  To confirm your identification, you should perform: