風疹後に発症した突発難聴症例の検討

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  • Two Cases of Hearing Loss Due to Rubella.

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Otoneurological findings in 2 cases of acute hearing loss due to rubella were reported. A 37-year-old man complained of hearing loss 2 weeks after rubella infection. Audiogram showed 39dB sensorineural deafness 3 days after onset. The diagnosis was confirmed serologically by rising rubella complement fixation reaction antibody titer 16:1 and positive specific IgM. The other patient was a 37-year old man who complained of tinnitus and fullness of ear one week after rubella infection. Audiogram showed 14dB sensorineural deafness 7 days after onset. The rubella haemangglutination antibody titer rose from 8:1 in the first week to 128:1 one week later. The hearing loss of these cases was improved four month after onset. From these findings we concluded that rubella infection played an etiologic role in sudden deafness.<br>Separately from the above 2 cases, we measured the rubella IgM antibody values in the serum of 131 patients with sudden deafness. In all of the cases the IgM value was negative.

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