The image shows the surface of a 5% sheep blood agar plate (BAP) after 48 hours incubation at 35° C in 10% CO2. The colonies shown are small, flat, entire, dull gray, and show superficial pitting of the agar (see yellow arrows). A slight discoloration of the agar surrounding the colonies is seen and a bleach-like odor is detected. Similar growth was seen on a chocolate (CHOC) agar plate set up in parallel. Growth was not observed on the MacConkey (MAC) plate.
