Emejulu A C, Alabaronye F F, Ezenwaji H M, Okafor F C
Department of Zoology, University of Nigeria, Nsukka, Enugu State.
J Helminthol. 1994 Jun;68(2):119-23. doi: 10.1017/s0022149x00013638.
In epidemiological surveys for urinary schistosomiasis caused by Schistosoma haematobium in communities around Agulu Lake, Anambra State, Nigeria, between 1990 and 1992, the infection was found to be endemic in the area, especially in three towns: Nri, Agulu, and Adazi Nnukwu. The prevalence rates varied between these communities and with the year. Inter-town prevalence rates ranged from 5.96% to 54.00%. Intravillage prevalence rates ranged between 5.50% to 96.43%. Prevalence rates were highest in villages very close to Agulu lake. There was no significant difference in prevalence between the schools. Host age, but not sex, was found to play a significant role in prevalence and intensity of infection. There was also a strong correlation between visible haematuria and egg count per 10 ml urine, but eggs could be isolated in urine samples of different shades of coloration. Analysis of incidence of infection in these communities shows that Schistosoma haematobium incidence is high in Nri (55.17%) and low at Adazi Nnukwu (5.26%). Both Bulinus globosus and B. truncatus were found in the lake and both shed mammalian bifid schistosome cercariae.
1990年至1992年期间，在尼日利亚阿南布拉州阿古卢湖周边社区开展的关于由埃及血吸虫引起的泌尿生殖系统血吸虫病的流行病学调查中，发现该地区存在该病的地方流行情况，尤其是在三个城镇：恩里、阿古卢和阿达齐努库武。这些社区之间以及不同年份的患病率有所不同。城镇间的患病率在5.96%至54.00%之间。村内患病率在5.50%至96.43%之间。离阿古卢湖非常近的村庄患病率最高。各学校之间的患病率没有显著差异。研究发现，宿主年龄而非性别在感染率和感染强度方面起着重要作用。肉眼血尿与每10毫升尿液中的虫卵计数之间也存在很强的相关性，但在不同颜色深浅的尿液样本中均可分离出虫卵。对这些社区感染发病率的分析表明，恩里的埃及血吸虫发病率较高（55.17%），而阿达齐努库武的发病率较低（5.26%）。在该湖中发现了球拟钉螺和截形拟钉螺，二者均释放哺乳动物双叉血吸虫尾蚴。
