·B| ue-Green biology pyocyanin(blue ) and pyoverdine green) Gram-negative; bacillus with unipolar motility Oxidase(+); glucose(+ but lactose (-biology • Blue-Green pyocyanin (blue) and pyoverdine (green) • Gram-negative; bacillus with unipolar motility • Oxidase(+); glucose(+) but lactose(-)