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Micrococci in comparison to staphylococci are larger and measure up to 2 mm in diameter. In smears, they appear as Gram-positive cocci arranged in tetrads. On culture, they pro-duce colonies with yellow, pink, or red pigments. It is doubtful that they are human pathogens.
They are Gram-positive cocci most commonly found in seawater, prawns, and shrimp. They are distinguished from other Gram-positive cocci by their ability to grow in a higher salt concentra-tion of 12% sodium chloride. They are nonpathogenic to humans.
They are capsulated Gram-positive cocci arranged in pairs or clusters. On culture, they produce white and mucoid colonies. It is doubtful that they are human pathogens.
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