Rinsho Shinkeigaku (Clinical Neurology)

Case Report

A case of tick-borne encephalitis without any sequelae

Daiki Tanaka, M.D.1), Megumi Abe, M.D.1), Kiyomi Kuroshima, M.D.1), Shigehisa Ura, M.D.1), Kazuto Yoshida, M.D., Ph.D.1) and Ichiro Yabe, M.D., Ph.D.2)

1) Department of Neurology, Japanese Red Cross Asahikawa Hospital
2) Department of Neurology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University

A 43-year-old woman with a history of tick bite in the mountains in Hokkaido presented with a fever of 39°C, headache, and nausea. Cerebrospinal fluid findings indicated meningitis. On day 3 after admission, she presented with restlessness, disturbance of consciousness, and ataxic breathing, indicative of encephalitis. We administered steroid pulse therapy, tracheal intubation, and a respirator. Her symptoms improved gradually and she was able to breathe without the respirator on day 10 after admission. She was discharged on day 24 after admission with no sequelae. This is the fifth reported case of tick-borne encephalitis in Japan. In the previous four cases, the patients died or suffered severe sequelae. This is the first case without any sequelae in Japan.
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(CLINICA NEUROL, 61: 310−313, 2021)
key words: tick-borne encephalitis, tick, flavivirus

(Received: 7-Oct-20)