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Micrococcus pigmented colonies Micrococcus indirect stain with tetrads
Micrococcus is a Gram-positive aerobic oxidase-positive coccus that can frequently be found in soil and on skin. Many Micrococcus colonies are vividly pigmented yellow (M. luteus), orange (M. nishinomiyaensis), pink (M. roseus) or red (M. agilis). The bacteria often arrange on clusters of four (tetrads) but tend to resemble staphylococci when Gram-stained.
Bergey's Manual Volume 5: The Actinobacteria