Key result
Intranasal inoculation of mice with reovirus resulted in detectable reovirus antigen in the middle ear mucosa in 75% of infected animals by day 4, and histologic evidence of otitis media in 54%.
Provides murine model for viral otitis media; leaves open human relevance and requires clinical validation.
The goals of this study were to develop a mouse model for virally induced otitis media, and to study the immune response to infection. Intranasal inoculation of mice by reovirus was used to induce otitis media. Immunohistochemical evidence for the presence of reovirus in the nasopharynx, eustachian tubes, and middle ears and the amount of infiltrating B-cells and T-cells in those sites were serially evaluated by painlessly sacrificing animals over a 21 -day period. Reovirus antigen was detected in the middle ear mucosa by day 4 in 75% of infected animals, and histologic evidence for otitis media was found in 54% of all infected animals. A significant increase in B-cells in the nasopharynx and eustachian tubes was noted 7 to 10 days following infection. The number of infiltrating T-cells did not vary significantly from that in the control animals at any of the sites. These results provide a basis for further investigations of the immune response in otitis media.
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Meek et al. (1999) studied Virally induced otitis media. Intranasal inoculation of reovirus vs. Control animals was evaluated on Presence of reovirus antigen in the middle ear mucosa by day 4. Intranasal inoculation of mice with reovirus resulted in detectable reovirus antigen in the middle ear mucosa in 75% of infected animals by day 4, and histologic evidence of otitis media in 54%.
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