Historically most often caused by H. influenza type B but with the availability of immunization this is no longer the case
Bacteria most often causing infection presently are Streptococcus pneumoniae, Streptococcus pyogenes, or Staphylococcus aureus
Clinical presentation
Symptoms
Severe sore throat
Drooling saliva
Pyrexia
Signs
Examination of oral cavity is normal - no inflammation of tonsils
May have stridor
Investigations
Clinical diagnosis
Because of the risk of inducing laryngeal spasm and/or total airway obstruction, examination of the pharynx and larynx should be attempted only in an area with adequate equipment and staff prepared to intervene should upper airway obstruction develop