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Cocci |
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Cocci
berry-shaped bacteria; diameter, 1–2 microns. Cocci are nonmotile and gram-positive, form no spores, and reproduce by transverse division. Classified as cocci are Micrococci, Streptococci, Staphylococci, and Sarcina. On solid nutrient media cocci form round, smooth convex colonies (gray, white, yellow, or red). Cocci are widely distributed in nature, living in soil, air, and food products. Lactic-acid streptococci are used in making sour cream, butter, and clabbers. Pathogenic streptococci and staphylococci produce inflammatory processes and purulent diseases—for example, furunculosis, erysipelas, and angina. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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