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===''E. coli'' characteristics===
===''E. coli'' characteristics===
*Usually motile with flagella and fimbriae
*Oxidase negative (do not possess cytochrome C oxidase)
*Oxidase negative (do not possess cytochrome C oxidase)
*Grow on MacConkey agar (in presence of bile salts)
*Grow on MacConkey agar (in presence of bile salts), producing pink colonies
*Haemolytic activity on blood agar characteristic of certain strains
*Lactose fermenter
*Reduce nitrates to nitrits and ferment glucose to produce acid and gas
*Reduce nitrates to nitrits and ferment glucose to produce acid and gas
*Possess a lipolysaccharide (O) antigen, a flagellate (H) antigen, polysaccharide capsule (K) antigens and fimbrial (F) antigens
*Possess a lipolysaccharide (O) antigen, a flagellate (H) antigen, polysaccharide capsule (K) antigens and fimbrial (F) antigens