Though there were no signs of meningeal irritation, lumbar puncture on the fifteenth day of his illness produced cerebrospinal fluid containing 100 lymphocytes/c. mm.

• 虽然没有脑膜刺激的临床体征；但在病程第15天作腰椎穿刺检查时；脑脊液中的淋巴细胞数为100/c.；mm。