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The primary habitat of E coli is in the gastrointestinal (GI) tract of humans and many other warmblooded animalsOn Endo agar it looks like lactose negative)All four strains are mannitol positive (best seen in fig D), cellobiose negative (strains A, B)4 Applying counterstain (safrinin) to bacterial smear as last step of endospore stain; Bacteria Under The Microscope E Coli And S Aureus Youtube How to identify e coli under a microscope
