Bagalwa M, Baluku B
Laboratoire de Malacologie, Centre de Recherche en Sciences Naturelles, Lwiro, République Démocratique du Congo.
Med Trop (Mars). 1997;57(4):369-72.
In eastern Democratic Republic of Congo, the prevalence of bilharziasis due to Schistosoma mansoni is high along the Kivu lake shoreline where Biomphalaria pfeifferi, i.e. the intermediate host of Schistosoma mansoni, is the only snail that has been described until now. Although their occurrence has not been reported in the area, other schistosomas remain possible since their intermediate hosts are present. This study was carried out in 1992 to determine the distribution of intermediate host snails in freshwater systems in the region. Samples were collected according to the standardized harvest time unit method. Five species of intermediate host snails for human schistosomiasis were identified. By far the most prevalent species was Biomphalaria pfeifferi which was found in 75% of the freshwater systems studied. Given the presence of Schistosoma mansoni in the region, spread of this type of schistosome is likely. Ferrissia burnipi, the recognized intermediate host of Schistosoma haematobium, was observed in association with Biomphalaria pfeifferi. Snails of the Bulinus genus were confined to special environments. Factors preventing infestation by Schistosoma haematobium and Schistosoma intercalatum remain unclear. Control measures against snails and their larvae in fresh water systems in the region are needed to stop the spread of Schistosoma mansoni and prevent the appearance of Schistosoma haematobium and Schistosoma intercalutum.
在刚果民主共和国东部，基伍湖沿岸曼氏血吸虫引起的血吸虫病流行率很高，在该地区，曼氏血吸虫的中间宿主菲氏小泡螺是目前已知的唯一蜗牛种类。尽管该地区尚未报告其他血吸虫的出现情况，但鉴于其中间宿主存在，其他血吸虫仍有可能存在。本研究于1992年开展，旨在确定该地区淡水系统中中间宿主蜗牛的分布情况。样本采集采用标准化收获时间单位法。鉴定出五种人类血吸虫病的中间宿主蜗牛。到目前为止，最常见的物种是菲氏小泡螺，在所研究的75%的淡水系统中都有发现。鉴于该地区存在曼氏血吸虫，这种类型的血吸虫很可能会传播。在菲氏小泡螺中发现了埃及血吸虫公认的中间宿主伯恩氏费里螺。泡螺属蜗牛局限于特殊环境。埃及血吸虫和间插血吸虫感染的预防因素尚不清楚。需要在该地区的淡水系统中采取控制蜗牛及其幼虫的措施，以阻止曼氏血吸虫的传播，并防止埃及血吸虫和间插血吸虫的出现。
