Three patterns of hemolysis can be observed on a blood agar plate. 1. Alpha ( a ) -hemolysis: incomplete lysis of RBC - Greenish, cloudy zone around the colony. 2. Beta ( b)-hemolysis: complete lysis ...

These tests are used to differentiate between alpha and beta hemolytic organisms ... will be taken from the blood agar plates inoculated in the previous lab. Repeat step 2 with the remaining 3 ...

After incubation of the epiglottic swab specimen on 5% sheep blood agar plates at 37°C in 5% carbon dioxide, the predominant colonies found were large and beta-hemolytic. Samples of these ...