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The Lancefield grouping system: a. Is used to identify -hemolytic streptococci. b. Depends on serological detection of polysaccharide and teichoic acid antigens. c. Depends on serological detection of polysaccharide and teichoic acid antigens and is used to identify -hemolytic streptococci. D. Is based on a DNA fingerprinting assay specific for streptococci.
Sagot :
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