Which of the following organisms grows as black colonies on blood agar?
Corynebacterium
Staphylococcus aureus
Escherichia coli
Pseudomonas aeruginosa

Which of the following organisms grows as black colonies on blood agar?
Corynebacterium
Staphylococcus aureus
Escherichia coli
Pseudomonas aeruginosa
Thank you, the majority got it right, it is Corynebacterium