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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

  • B. HANELT (a1), S. V. BRANT (a1), M. L. STEINAUER (a1), G. M. MAINA (a2), J. M. KINUTHIA (a2), L. E. AGOLA (a2), I. N. MWANGI (a2), B. N. MUNGAI (a2), M. W. MUTUKU (a2), G. M. MKOJI (a2) and E. S. LOKER (a1)...

Summary

Schistosoma 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. Schistosoma kisumuensis differs from these species by producing relatively small Schistosoma intercalatum-like eggs (135·2×52·9 μm) with a relatively small length to width ratio (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.

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Corresponding author

*Corresponding author: Department of Biology, University of New Mexico, MSC03 2020, Albuquerque, New Mexico, 87131-0001, USA. Tel: +505 2774589. Fax: +505 2770304. E-mail: bhanelt@unm.edu

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Keywords

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

  • B. HANELT (a1), S. V. BRANT (a1), M. L. STEINAUER (a1), G. M. MAINA (a2), J. M. KINUTHIA (a2), L. E. AGOLA (a2), I. N. MWANGI (a2), B. N. MUNGAI (a2), M. W. MUTUKU (a2), G. M. MKOJI (a2) and E. S. LOKER (a1)...

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