Conclusion The occurent human platue which occurred in Zhangye area was caused as patients directly got in touch with Marmota hemanayana of catching illnesses in Marmota plague focus.

• 结论张掖地区人类鼠疫的发生都是由于患者在旱獭鼠疫疫源地内直接接触染疫的旱獭所致。