Created by
Paul A. Gulig, Ph.D.
Department of Molecular Genetics and Microbiology
with assistance from
David Brumbaugh
How would you describe colony #1?
A. Beta-hemolytic and large.
Correct. There is a clearing of the red blood cells around the large colony with no discoloration to a greenish color (Alpha-hemolysis). It is not as striking as you will see with another case in this exercise.