213例口腔科门诊病人调查结果,发现齿龈内阿米巴感染率为50.70％,其中以牙、根、冠周炎和口腔粘膜病四组最高,各为58.62％、66.67％、79.16％和57.14％。单纯龋齿组最低为25.75％。差异非常显著(P<0.005)。感染率与年龄、性别无密切关系。通过形态学观察,发现由前四组口腔病患者检出的齿龈内阿米巴,大多具有形态清晰、运动频繁、生活力强和个体普遍较大等特点。并对其致病性作了讨论。 The results of 213 cases of outpatients showed that the infection rate of Entamoeba gingivalis was 50.70%, of which the highest was tooth, root, pericoronitis and oral mucosal disease, 58.62%, 66.67%, 79.16% and 57.14 respectively %. Simple caries group minimum 25.75%. The difference was significant (P <0.005). Infection rate and age, gender is not closely related. Morphological observation showed that most of the gingivalis amebiasis detected by the first four groups of oral disease patients had the characteristics of clear form, frequent movement, strong vitality and individual generality. And its pathogenicity was discussed.