Atopic allergy and otitis media with effusion

Area of Science:

• Allergy and Immunology
• Otolaryngology
• Pediatrics

Background:

• Otitis media with effusion (OME) is common in children.
• The role of type 1 allergy in OME pathogenesis remains unclear.
• Immunoglobulin E (IgE) is a key mediator in allergic reactions.

Purpose of the Study:

• To investigate the potential role of type 1 allergy in OME.
• To quantify IgE levels in middle ear effusions and serum of children with OME.
• To explore the relationship between atopy and OME.

Main Methods:

• Collected middle ear effusion and serum samples from 58 children with OME.
• Assayed IgE levels using the Phadebas paper radio immunosorbent test (PRIST).
• Utilized a modified PAP technique to detect surface IgE on mast cells.

Main Results:

• Elevated serum IgE levels, indicative of atopy, were observed in 14% of cases.
• The effusion/serum IgE ratio (E/S) was consistently below one, indicating higher serum IgE.
• Positive surface IgE on mast cells was found in nasal mucosa of atopic OME patients.

Conclusions:

• The findings do not support type 1 allergy as a major causative factor in OME.
• Further research on middle ear mucosa in OME is warranted.
• While atopy is present in some OME cases, IgE does not appear to play a significant role in the middle ear effusion itself.