Endo agar

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Endo agar

Endo agar (also called Endo's medium) is a microbiological growth medium with a faint pink colour.[1] Originally developed for the isolation of Salmonella typhi, it is now used mostly as a coliform medium. Most gram-negative organisms grow well in this medium, while growth of gram-positive organisms is inhibited.[2] Coliform organisms ferment the lactose in this medium, producing a green metallic sheen (i.e. Escherichia coli), whereas non-lactose-fermenting organisms produce clear, colourless colonies,[1] i.e. Salmonella sp..

Typical composition[edit]

Endo agar typically contains (w/v):[3]


  1. ^ a b Mondofacto
  2. ^ Becton, Dickinson and Company, [1], 2006
  3. ^ EMD Chemicals, "Archived copy". Archived from the original on 2009-04-13. Retrieved 2009-04-25. Cite uses deprecated parameter |deadurl= (help)CS1 maint: archived copy as title (link), 2002