Schistosoma kisumuensis n. sp (Digenea : Schistosomatidae) from murid rodents in the Lake Victoria Basin, Kenya and its phylogenetic position within the S. haematobium species group

作者：Hanelt B^*; Brant S V; Steinauer M L; Maina G M; Kinuthia J M; Agola L E; Mwangi I N; Mungai B N; Mutuku M W; Mkoji G M; Loker E S

来源：Parasitology, 2009, 136(9): 987-1001.

DOI：10.1017/S003118200900643X

• Digenea
• Schistosomatidae
• Schistosoma
• Schistosoma kisumuensis n. sp
• rodent parasite
• Kenya

Shistosoma kisumuensis n. sp. is described based on 6 adult males and 2 adult females collected from the circulatory system of 3 murid rodent species, Pelomys isseli, Mastomys natalensis, and Dasymys incomtus. Specimens were collected from a single location, Nyabera Swamp, in Kisumu, Kenya in the Lake Victoria Basin. This new species is morphologically similar to members of the S. haematobium group, currently represented by 8 species parasitizing artiodactyls and primates, including humans. Shistosoma kisumuensis differs from these species by producing relatively small Schistosoma intercalatum-like eggs (135.2 x 52.9 mu m) with a relatively small length to width ration (2.55). Comparison of approximately 3000-base-pair sequences of nuclear rDNA (partial 28S) and mtDNA (partial cox1, nad6, 12S) strongly supports the status of S. kisumuensis as a new species and as a sister species of S. intercalatum. The cox1 genetic distance between these two species (6.3%) is comparable to other pairwise comparisons within the S. haematobium group. Separation of the Congo River and Lake Victoria drainage basins is discussed as a possible factor favoring the origin of this species.

• 出版日期2009-8