Thread: Longest lived empires/states in history. 1 out of 1 members found this post helpful. Many lists have been written about the most long-lived empires or states in the history of mankind and oddly enough nobody seems to agree on the ranking.
E. coli is a Gram-negative (bacteria which do not retain crystal violet dye), facultative anaerobic (that makes ATP by aerobic respiration if oxygen is present, but is capable of switching to fermentation or anaerobic respiration if oxygen is absent) and nonsporulating bacterium.
EMB agar plate inoculated with Klebsiella pneumoniae (a gram-negative coliform bacterium) showing good growth of brown, dark-centered, mucoid colonies (smaller than Enterobacter) indicating lactose fermentation and acid production. On EMB if E.coli is grown it will give a distinctive metallic green sheen (due to the metachromatic properties of the dyes, E. coli movement using flagella, and strong acid end-products of fermentation). It is one of the few bacte Examples of EMB with different coliform bacteria.