Thirty-three children with chronic tonsillitis and/or adenoid enlargement and without previous diagnosis of sinusitis were studied regarding the bacterial flora of their maxillary sinuses. Puncture of maxillary sinus was performed at surgery (adenoidectomy and/or tonsillectomy) and aspirates were cultured. Streptococcus pneumoniae was isolated from 8 of 12 (66.7%) patients whose x-rays showed completely opacified maxillary sinus. Streptococcus viridans, Streptococcus faecalis, and Staphylococcus epidermidis were recovered from 6 (28.6%) of the 21 patients with normal maxillary sinus radiographs. Bacterial titers were greater than 10(4) colonies/mL in all but one of the positive cultures. No anaerobic bacteria were isolated. History of bronchial asthma, presence of nasal purulent secretion, elevated blood eosinophils, and elevated serum IgE were found more frequently in children with complete opacification of maxillary sinus. Serum levels of IgG2 were low in 29% of the children, but no correlation was found between low IgG2 levels and positive cultures from maxillary sinus aspirates. We concluded that children with complete radiologic opacification of maxillary sinus had bacterial infection in almost 70% of the cases with symptoms that did not prompt their physicians to consider the diagnosis of sinusitis.
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