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Unformatted text preview: referred to as cocci (the singular is coccus); the rod-shaped bacteria are bacilli (the singular is bacillus ); and the spiral bacteria are spirochetes if they are rigid or spirilla (the singular is spirillum ) if they are flexible. Cocci may occur in different forms. Those cocci that appear as an irregular cluster are staphylococci (the singular is staphylococcus ) and are the cause of staph infections. Cocci in beadlike chains are streptococci , and bacteria in pairs are diplococci . One streptococcus is the cause of strep throat, while another is a harmless organism used to make yogurt. A species of diplococcus is the agent of pneumonia, while a second causes gonorrhea, and a third is the agent of meningitis....
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- Fall '07