Grendon J H, DiGiacomo R F, Frost F J
Department of Epidemiology, School of Public Health and Community Medicine, University of Washington, Seattle 98195, USA.
J Trop Med Hyg. 1995 Oct;98(5):309-15.
A total of 237 cases of Dientamoeba fragilis were identified by a state public health laboratory in 1985 and 1986. Dientamoeba fragilis was the only parasite found in about two-thirds of the cases. Compared to Giardia cases diagnosed in a similar time period, D. fragilis occurred more frequently in females and in children 5-9 years old; it was also more likely to be detected in spring and summer months. Giardia occurred more frequently in children 0-4 years old. Seventy-nine per cent of 70 interviewed D. fragilis cases reported symptoms associated with infection; nearly 80% had diarrhoea or loose stools. Interviewed cases reported more household and non-household exposure to children 5-9 years old than children of other ages. The difference in age and sex distribution of D. fragilis and Giardia cases may be related to the life cycle and mode of transmission of the two protozoans.
1985年至1986年期间，某州公共卫生实验室共鉴定出237例脆弱双核阿米巴病例。在约三分之二的病例中，脆弱双核阿米巴是唯一发现的寄生虫。与同期诊断出的贾第虫病例相比，脆弱双核阿米巴在女性和5至9岁儿童中更为常见；在春季和夏季月份也更易被检测到。贾第虫在0至4岁儿童中更为常见。在接受访谈的70例脆弱双核阿米巴病例中，79%报告了与感染相关的症状；近80%有腹泻或稀便。接受访谈的病例报告称，与其他年龄段的儿童相比，5至9岁儿童的家庭和非家庭接触更多。脆弱双核阿米巴和贾第虫病例在年龄和性别分布上的差异可能与这两种原生动物的生命周期和传播方式有关。
