流行性脑脊髓膜炎(以下简称流脑)是由脑膜炎双球菌引起的化脓性脑膜炎。本病检查周围血象时,白细胞总数升高一般在20000/mm~3左右,高者达0000/mm~3或以上,中性粒细胞在80%～90%以上。在流脑流行季节,遇有发热、头痛、颈项强直的病人,结合周围血象的改变,即可做出流脑的拟似诊断。但近几年在流脑的防治工作中,发现部分病人周围血象正常,给诊断带来困难,有时甚或延误治疗。本文结合5例白细胞总 Epidemic meningitis (hereinafter referred to as meningitis) is meningitis meningitis caused by meningitis. The examination of peripheral blood when the disease, the total increase in white blood cells generally about 20000 / mm ~ 3, the highest up to 0000 / mm ~ 3 or more, neutrophils in more than 80% to 90%. In the meningococcal epidemic season, in case of fever, headache, stiff neck patients, combined with changes in peripheral blood, you can make a mock diagnosis of meningitis. However, in the prevention and treatment of meningitis in recent years, some peripheral blood samples were found to be normal, which made it difficult to diagnose and sometimes even delayed the treatment. This article combines 5 cases of total white blood cells