Hui (pronounced “Hway”) explains:
I present you with possibly one of the more complicated pieces I’ve done so far. This is a special kind of agar (CHROMagar) plate featuring yeast! The different colors on this plate are supposed to help you quickly differentiate what kind of Candida yeast you are dealing with. It’s quite expensive agar and has a short shelf life, but can help with quick visuals if dealing with many specimens.
The sketch shows the plating she plotted out beforehand, with each Candida species labeled.