Maegga B T, Cupp E W
National Institute for Medical Research, Tukuyu Station, Tanzania.
Trop Med Parasitol. 1993 Sep;44(3):165-71.
Identification of Simulium damnosum s.l. vectors of onchocerciasis demands adequate knowledge of the chromosomal features that distinguish human-biting members from nonanthropophilic forms. In this study, 955 S. damnosum larvae collected from various geographical locations in Tanzania were chromosomally analyzed. 358 larvae from small mountain streams in the northeast and central regions of Tanzania, were identified as mainly Nyamagasani and Sanje forms, with only one Kiwira form. 378 larvae from plain and lowland rivers, also in the northeast and central regions, were identified as Nkusi, Kisiwani and Kibwezi forms. Chromosomal examination of 219 larvae from the southern highlands zone revealed the presence of Kiwira and Nyamagasani forms. A further 27 larvae of S. damnosum complex collected from 5 rivers in Uganda were identified as Sebwe and Nkusi forms. Chromosomal photomicrographs on which the distinguishing characters were based are provided. These observations are discussed in the light of previous studies carried out on the S. damnosum cytological forms in Eastern Africa.
鉴别盘尾丝虫病的须舌蝇传播媒介，需要充分了解区分嗜人种类与非嗜人种类的染色体特征。在本研究中，对从坦桑尼亚不同地理位置采集的955只须舌蝇幼虫进行了染色体分析。从坦桑尼亚东北部和中部山区小溪采集的358只幼虫，主要鉴定为尼亚马加萨尼和桑杰类型，只有一只基维拉类型。同样来自东北部和中部地区平原及低地河流的378只幼虫，鉴定为恩库西、基西瓦尼和基布韦齐类型。对来自南部高地地区的219只幼虫进行染色体检查，发现有基维拉和尼亚马加萨尼类型。从乌干达5条河流采集的另外27只须舌蝇复合种幼虫，鉴定为塞布韦和恩库西类型。文中提供了基于鉴别特征的染色体显微照片。结合之前对东非须舌蝇细胞学类型的研究，对这些观察结果进行了讨论。
