单词	Group A
释义	Group A noun : any of various strains of a streptococcus (Streptococcus pyogenes) that include the causative agents of pharyngitis, scarlet fever, septicemia, some skin infections, rheumatic fever, and glomerulonephritis —usually used attributively Group A strep throat Word History First Known Use 1945, in the meaning defined above Medical Definition Group A noun -ˈā  : the Lancefield group of beta-hemolytic streptococci that comprises all strains of a species of the genus Streptococcus (S. pyogenes) and that includes the causative agents of pharyngitis, scarlet fever, septicemia, some skin infections (as pyoderma and erysipelas), rheumatic fever, and glomerulonephritis —usually used attributively Group A streptococcal infections compare group b
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