Results The film appeared a large number of protozoon, there were congestion and inflammation on alveolus wall.

• 结果病鼠肺组织印片中有大量原虫,镜下见肺泡壁充血和炎性细胞浸润,肺泡腔内有大量炎性渗出液,一些病灶呈实变。