For staphylococci, the characteristic of blood agar medium is that it can promote the production of staphylococcal hemolysin, so it can cause obvious hemolysis of staphylococci, thus accurately detecting the pathogenicity of staphylococci. At the same time, blood agar medium can also detect other pathogenic factors such as lectin and protease produced by staphylococcus.
For streptococcus, blood agar medium can be used to judge its pathogenicity by detecting its hemolysis on the medium. On blood agar medium, hemolysin produced by streptococcus can dissolve red blood cells, thus forming hemolytic ring, which can be used to identify the pathogenicity of streptococcus. In addition, streptococcus grows faster on blood agar medium, and its pathogenicity can be detected quickly.
To sum up, blood agar medium is an important tool to analyze the pathogenicity of Staphylococcus and Streptococcus. By detecting pathogenic factors such as hemolysis of bacteria on culture medium, the pathogenicity of bacteria can be accurately identified.