Endo agar

{{Short description|Culture medium used in microbiology}}

Image:Endo-Agar.jpg

Endo agar (also called Endo's medium) is a microbiological growth medium with a faint pink colour.{{Cite web |url=http://www.mondofacto.com/facts/dictionary?Endo+agar |title=Mondofacto |access-date=2009-04-25 |archive-url=https://web.archive.org/web/20160303205734/http://www.mondofacto.com/facts/dictionary?Endo+agar |archive-date=2016-03-03 |df=mdy-all |url-status=dead }} 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.{{Cite web |title=Traditional Microbiology |date=2006 |url=http://www.bd.com/ds/productCenter/221167.asp |archive-url=https://web.archive.org/web/20160303231139/http://www.bd.com/ds/productCenter/221167.asp |archive-date=2016-03-03 |df=mdy-all |access-date=2022-11-28 |website=Becton, Dickinson and Co. (BD)}} 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, i.e. Salmonella species.