Friis H, Byskov J
Regional Health Team, Maun, Botswana.
Trop Geogr Med. 1987 Jul;39(3):251-5.
Recent surveys in Ngamiland, Botswana, indicate increasing prevalence of Schistosoma mansoni infections. With the introduction of a schistosomiasis control programme, 354 of 373 schoolchildren were examined quantitatively for eggs of S. mansoni, and 317 were examined clinically for hepato- and splenomegaly. 80.5% of the children examined parasitologically were found infected. Among these the arithmetric mean egg output was 744.7 and the geometric mean 307.3 eggs per gram of faeces (epg), 46.0% were excreting more than 400 epg. 23 children were found to have an enlarged liver, whereas none was found with enlarged spleen. 21 of these had schistosomiasis. The prevalence of hepatomegaly was highest among those excreting above 1600 epg. Also the mean size of the enlarged livers increased with intensity of infection.
最近在博茨瓦纳的尼亚米兰进行的调查表明，曼氏血吸虫感染的患病率在上升。随着血吸虫病控制项目的推行，对373名学童中的354名进行了曼氏血吸虫虫卵的定量检测，并对317名进行了肝脏和脾脏肿大的临床检查。经寄生虫学检查的儿童中，80.5%被发现感染。在这些感染儿童中，每克粪便的算术平均虫卵排出量为744.7个，几何平均为307.3个虫卵/克粪便（epg），46.0%的儿童排出的虫卵超过400 epg。发现23名儿童肝脏肿大，而未发现脾脏肿大的儿童。其中21名患有血吸虫病。在虫卵排出量高于1600 epg的人群中，肝肿大的患病率最高。而且肿大肝脏的平均大小随感染强度增加。
