Todd-Hewitt agar

Todd-Hewitt agar

Todd-Hewitt agar is a nutrient-rich special culture medium, which is mainly used for the isolation and culture of streptococcus, especially β -hemolytic streptococcus, and subsequent serotyping. Its basic components include bovine heart extract, casein trypsin digest and beef extract powder, providing high concentration of nitrogen source, vitamins and growth factors; The addition of glucose and sodium bicarbonate can optimize the growth environment of streptococcus and enhance its hemolytic activity. This culture medium can promote the typical hemolysis of streptococcus, and it is an important tool for streptococcus culture, hemolysis observation and preparation of bacterial suspension for synergistic agglutination test in clinical microbiology laboratory.

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