Failure to isolate streptococci from children under the age of 3 years with exudative tonsillitis.
D002675:Child, Preschool; D006193:Haemophilus influenzae; D006801:Humans; D007223:Infant; D011008:Pneumococcal Infections; D013290:Streptococcal Infections; D014069:Tonsillitis / Q000209:etiology*; D014777:Virus Diseases