title: Effect of upper respiratory tract infection on eustachian tube ventilatory function in the preschool child.
abstract: A prospective tympanometric and microbiologic study of 28 pre-schoolchildren was undertaken to better define the effect of acute URI on induction of eustachian tube dysfunction. Significant negative middle ear pressure was present in 12.7% of tympanograms from well children. However, abnormal tympanograms were detected during 74.7% of acute URIs. The abnormality was present on day 1 or 2 of illness in the majority of cases; 10.1% of illnesses were complicated by OME. Respiratory viruses or Sp were etiologically implicated in 40.5% of illnesses; isolation rates of Pn and HF from well and ill children were similar. Although colonization of the nasopharynx of well children with Pn or HF was associated with a higher incidence of abnormal middle ear pressure, colonization with Pn or HF during URI did not influence the frequency of tympanogram abnormality.
mesh_terms: D000158:Acoustic Impedance Tests; D001424:Bacterial Infections; D002675:Child, Preschool; D005064:Eustachian Tube / Q000503:physiopathology*; D005260:Female; D006193:Haemophilus influenzae / Q000302:isolation & purification; D006801:Humans; D008297:Male; D009305:Nasopharynx / Q000382:microbiology; D012141:Respiratory Tract Infections / Q000209:etiology / Q000382:microbiology / Q000503:physiopathology*; D013296:Streptococcus pneumoniae / Q000302:isolation & purification; D014777:Virus Diseases