Klebsiella, Enterobacter and Escherichia coli on EMB Agar

Klebsiella Characteristic mucoid colonies are a consequence of the organism’s abundant polysaccharide capsule. Lactose-fermenting colonies Escherichia coli colonies Lactose-fermenting ...

E. coli and a non-lactose fermentation

MacConkey agar inoculated with lactose-fermenting Escherichia coli (at left) and non-lactose-fermenting Proteus (at right). Lactose-fermenting bacteria appear bright pink, while non-lactose-fermenting ...

ONPG Test – ( o-nitrophenyl-β-D-galactoside)

Purpose: this test is used to demonstrate the presence or absence of the enzyme B-galactosidase using the substrate Ortho-nitrophenyl-D-galactopyranoside in order to differentiate ...
Klebsiella pneuomoniae mucus colonies

Gram-negative Bacilli of Klebsiella pneumoniae

Klebsiella pneumoniae is a Gram-negative, non-motile, encapsulated, lactose fermenting, facultative anaerobic, rod shaped bacterium found in the normal flora of the mouth, skin, and ...
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