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TINSDALE AGAR BASE New 500 grams/bottle

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Tinsdale Agar Base is a selective medium for the diagnostic of diphtheria, a disease of the upper respiratory tract. Proteose peptone  Nº 3 provides nitrogen, vitamins, minerals and amino acids essential for growth. Sodium chloride supplies essential electrolytes for transport and osmotic balance. Sodium thiosulfate, which provides sulfur and L-Cystine, is the indicator for H2S production. Bovine serum is an additional source that provides growth factors for the microorganisms. Potassium tellurite is an inhibitor of most Gram negative bacteria and most of the upper respiratory tract flora. Due to the production of H2S, the potassium tellurite is reduced, forming a halo surrounding the colony. Haemophilus, Klebsiella, Neisseria, Staphylococcus and Streptococcus species grow as dark, brown colonies without halos.
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