E.coli which is growing on the EMB plate below shows the green metallic shine that you sometimes see when cells release a lot of acid during lactose fermentation.

Proteus Pathogenesis and Infectious Disease: a common cause of urinary tract infections and wound infections, septicemia, and pneumonia Test Results: P. mirabilis : Lactose fermentation: ...

Klebsiella sp. Pathogenesis and Infectious Disease: K. pneumoniae is a significant cause of respiratory (especially pneumonia) and urinary tract diseases (opportunist) K. ozaenae ...