齿龈内阿米巴(Entamoeba gingi-valis Gros,1849)系属于肉足鞭毛门,叶足钢的原虫。据《人体寄生虫学》记载“寄生于齿间,齿龈化脓时多见,但并非本虫所致”。齿龈内阿米巴分布于世界各地,国外有报告在口腔卫生不良人群中95％以上的人感染本虫;其他人群感染亦在50％以上。在我国却被认为是寄生于人体的“罕见”原虫。为了解我国人体对本虫的感染情况以及与口腔疾病的关系,近年国内苏州、南京等城市进行了一些调查。我们于1984年4月对南充市居民、口腔科 Entamoeba gingi-valis Gros (1849) belongs to the genus Protozoa of the meaty flagellum and leaf-footed steel. According to “human parasitology” records “parasitic in the interdental, gingival suppuration is more common, but not caused by this worm.” Gingival amoebiasis distributed throughout the world, foreign reports of more than 95% of people with oral hygiene poor people infected with the worm; other population infection is also above 50%. In our country is considered to be parasitic on the human body “rare” protozoa. In order to understand the human body’s infection of this insect and its relationship with oral diseases, some domestic cities such as Suzhou and Nanjing conducted some investigations in recent years. We in April 1984 on the residents of Nanchong City, Department of Stomatology