Titre du document / Document title

Affinities between Asian non-human Schistosoma species, the S. indicum group, and the African human schistosomes

Auteur(s) / Author(s)

AGATSUMA T. ⁽¹⁾ ; IWAGAMI M. ⁽¹⁾ ; LIU C. X. ⁽²⁾ ; RAJAPAKSE R. P. V. J. ⁽³⁾ ; MONDAL M. M. H. ⁽⁴⁾ ; KITIKOON V. ⁽⁵⁾ ; AMBU S. ⁽⁶⁾ ; AGATSUMA Y. ⁽⁷⁾ ; BLAIR D. ⁽⁸⁾ ; HIGUCHI T. ⁽²⁾ ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

⁽¹⁾ Department of Environmental Health Science, Faculty of Medicine, Kochi Medical School, Oko, Nankoku 783-8505, JAPON
⁽²⁾ Department of Physiology, Faculty of Medicine, Kochi Medical School, Oko, Nankoku 783-8505, JAPON
⁽³⁾ Department of Veterinary Para-clinical Studies, University of Peradenyia, Peradenyia, SLOVAQUIE
⁽⁴⁾ Department of Veterinary Medicine, Bangladesh Agriculture University, Mymensingh, BANGLADESH
⁽⁵⁾ Department of Social and Environmental Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok, THAILANDE
⁽⁶⁾ Division of Medical Ecology, Institute for Medical Research, Kuala Lumpur, MALAISIE
⁽⁷⁾ Laboratory of Clinical Technology, Kochi Gakuen College, Asahi-Tenjin, Kochi 780-0955, JAPON
⁽⁸⁾ Department of Zoology and Tropical Ecology, James Cook University, Townsville, Queensland 4811, AUSTRALIE

Résumé / Abstract

Schistosoma species have traditionally been arranged in groups based on egg morphology, geographical origins, and the genus or family of snail intermediate host. One of these groups is the 'S. indicum group' comprising species from Asia that use pulmonate snails as intermediate hosts. DNA sequences were obtained from the four members of this group (S. indicum, S. spindale, S. nasale and S. incognitum) to provide information concerning their phylogenetic relationships with other Asian and African species and species groups. The sequences came from the second internal transcribed spacer (ITS2) of the ribosomal gene repeat, part of the 28S ribosomal RNA gene (28S), and part of the mitochondrial cytochrome c oxidase subunit 1 (CO1) gene. Tree analyses using both distance and parsimony methods showed the S. indicum group not to be monophyletic. Schistosoma indicum, S. spindale and S. nasale were clustered among African schistosomes, while S. incognitum was placed as sister to the African species (using ITS2 and 28S nucleotide sequences and CO1 amino acid sequences), or as sister to all other species of Schistosoma (CO1 nucleotide sequences). Based on the present molecular data, a scenario for the evolution of the S. indicum group is discussed.

Revue / Journal Title

Journal of helminthology   ISSN 0022-149X   CODEN JOHLAT 

Source / Source

2002, vol. 76, n^o1, pp. 7-19 (16 ref.)

Langue / Language

Anglais

Editeur / Publisher

Cambridge University Press, Oxon, ROYAUME-UNI  (1923) (Revue)

Mots-clés anglais / English Keywords

Invertebrata ; Helmintha ; Plathelmintha ; Trematoda ; Molecular systematics ; Africa ; Asia ; Geographical variation ; Parasite ; Phylogeny ; DNA ; Nucleotide sequence ; Taxonomy ;

Mots-clés français / French Keywords

Invertebrata ; Helmintha ; Plathelmintha ; Trematoda ; Systématique moléculaire ; Schistosoma indicum ; Afrique ; Asie ; Variation géographique ; Parasite ; Phylogenèse ; DNA ; Séquence nucléotide ; Systématique ;

Mots-clés espagnols / Spanish Keywords

Invertebrata ; Helmintha ; Plathelmintha ; Trematoda ; Africa ; Asia ; Variación geográfica ; Parásito ; Filogénesis ; DNA ; Secuencia nucleótido ; Sistemática ;

Localisation / Location

INIST-CNRS, Cote INIST : 6411, 35400010262344.0020