Anatomic sites included:
(1) pharynx
(2) epiglottis
(3) larynx
Criteria for the diagnosis of an upper respiratory tract infection – one or both of the following:
(1) abscess or other evidence of an upper respiratory tract infection seen on direct inspection or at surgery
(2) abscess or other evidence of an upper respiratory tract infection seen on histopathologic examination of material removed from the upper respiratory tract
(3) all of the following:
(3a) 2 or more of the following:
(3a1) fever (temperature > 38°C; > 38°C rectal if age <= 12 months)
(3a2) hypothermia (< 37°C rectal) and age <= 12 months of age
(3a3) purulent exudates in the throat
(3a4) erythema of pharynx
(3a5) sore throat
(3a6) cough
(3a7) hoarseness
(3a8) apnea if age <= 12 months of age
(3a9) bradycardia if age <= 12 months of age
(3a10) nasal discharge if <= 12 months of age
(3b) 1 or more of the following:
(3b1) pathogenic organisms cultured from the upper respiratory tract
(3b2) organisms cultured from blood
(3b3) positive antigen test on blood or respiratory secretions
(3b4) diagnostic serologic test (single IgM antibody titer or 4-fold rise in IgG inpaired serum samples)
(3b5) physician diagnosis of an upper respiratory tract nfection
(3c) no other recognized cause
