title: The group A streptococcal upper respiratory tract carrier state: an enigma.
mesh_terms: D002353:Carrier State / Q000175:diagnosis; D002648:Child; D006801:Humans; D012141:Respiratory Tract Infections / Q000175:diagnosis / Q000209:etiology / Q000635:transmission*; D013290:Streptococcal Infections / Q000175:diagnosis / Q000635:transmission*; D013297:Streptococcus pyogenes