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To evaluate the efficacy and otologic effects of recombinant interferon beta serine for experimental rhinovirus colds, 38 healthy adults received nasal drops of recombinant interferon beta serine, 12 x 10(6) U, or placebo three times daily for 4.3 days beginning 36 hours after infection. Illness rates and severity did not differ between the groups, but the frequency of virus shedding was reduced on the fourth (37% vs 74%) and sixth (11% vs 42%) postchallenge days in recipients of recombinant interferon beta serine. Abnormal eustachian tube function in at least one ear was identified by the inflation-deflation test during 44% of observations in 13 infected recipients of recombinant interferon beta serine compared with 62% of observations in five placebo recipients. Tympanometry revealed middle-ear pressure abnormalities (less than -50 or greater than 20 mm H2O) in at least one ear during 18% of observations in recipients of recombinant interferon beta serine compared with 38% of observations in placebo recipients. These results suggest that antiviral therapy may alter the course of middle-ear dysfunction associated with experimental colds.
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