内蒙古吉文林区于１９９４年８月２１日至７月２８日共发生森林脑炎５６例，其中２６例合并莱姆病，这在内蒙古为首次发现。现对２６例双重感染病人的临床资料加以分析，其中２０例具有森林脑炎和莱姆病典型临床表现，占７６．９％；有６例只有森林脑炎的一般临床表现，占２３．１％，莱姆病属于隐性感染。对其他有关问题也进行了探讨。 There were 56 cases of forest encephalitis in Ji Wenlin District of Inner Mongolia from August 21 to July 28, 1994, of which 26 cases were associated with Lyme disease. This was the first discovery in Inner Mongolia. The clinical data of 26 patients with double infections are analyzed now, of which 20 cases have typical clinical manifestations of forest encephalitis and Lyme disease, accounting for 76.9%; 6 cases are only the clinical manifestations of forest encephalitis accounting for 23.1 %, Lyme disease is recessive infection. Other related issues have also been explored.