High quality blood agar plates are required to reliably determine hemolysis type. They are typically light red in color (Figure 2), which is a characteristic feature of intact erythrocytes.

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 ...

It works well, but it can take days to obtain results. The bacteria are placed on a "blood agar" plate. If they are beta-hemolytic bacteria, they will produce an enzyme that breaks down red blood ...

After incubation of the epiglottic swab specimen on 5% sheep blood agar plates at 37°C in 5% ... Pediatric Epiglottitis Caused by Group G Beta-Hemolytic Streptococcus - Medscape - Sep 01, 2003 ...

BETA-hemolytic streptococci of Lancefield Group B have been implicated in human ... it produces a narrower and less definite zone of beta hemolysis on blood agar plates than most of the other ...

Three strains of beta-hemolytic streptococci required 50 microgm. Of the 10 strains of enterococci, 6 were inhibited by 0.8–6.25 microgm. per milliliter, and 4 required 50 microgm. or more.

Beta-hemolytic bacteria are those pathogens that are frequently to blame ... The current test was developed back in 1903 and involves streaking a patient sample onto blood agar plates. It ...

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 colonies ...