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Todd-Hewitt Broth

Todd-Hewitt Broth is used for the cultivation of streptococci, pneumococci and other fastidious organisms. Heart Infusion provides a source of nitrogen. Peptone provides essential vitamins and minerals.

Specifically, used for the cultivation and serological typing of Gp A hemolytic streptococci. Modifications as per Updyke –Nickels originally formulated by Todd-Hewitt. Beef heart infusion, yeast extract and casein added as nutritional supplements.