A phylogeny based on three mitochondrial genes supports the division of Schistosoma intercalatum into two separate species

  title={A phylogeny based on three mitochondrial genes supports the division of Schistosoma intercalatum into two separate species},
  author={Richard A. Kane and Vaughan R. Southgate and David Rollinson and D. Timothy J. Littlewood and Anne E. Lockyer and J R Pag{\`e}s and Louis-Albert Tchuem Tchuent{\'e} and Joseph Jourdane},
  pages={131 - 137}
Two recognized strains of Schistosoma intercalatum, one from the Democratic Republic of Congo (DRC), formerly Zaire, and the other from Cameroon, have been investigated using DNA sequences from 3 mitochondrial genes, cytochrome oxidase subunit 1 (cox1), NADH dehydrogenase subunit 6 (nad6) and the small ribosomal RNA gene (rrnS). In addition, partial DNA sequences from the nuclear large subunit ribosomal RNA gene (lsrDNA) were included within the study. Although partial lsrDNA alone reveals… 
Polymorphism of the cox1 gene in cercariae isolates of bird schistosomes (Trematoda:Schistosomatidae) from ponds of Moscow and Moscow region
Divergence of the three birdschistosome species under study and divergence of the Asian species of mammalian schistosomes were almost concurrent, dating back to 2.5–3.8 Myr ago.
Understanding the Phylogenetics and Evolution of Genus Schistosoma- Africa and Asia Stand Point
The evolutionary trend of this parasite was examined while limiting the investigation to Schistosoma species peculiar to this region of the world, with all members of this species complex were AT rich, with S. mekongi and S. malayensis having the highest AT nucleotide composition.
Molecular Identification of Schistosoma mattheei from Feces of Kinda (Papio cynocephalus kindae) and Grayfoot Baboons (Papio ursinus griseipes) in Zambia
This is the first molecular identification of S. mattheei from free-ranging baboons in Zambia and it may affect other wildlife species and humans that live in close proximity to baboons.
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
Comparison of approximately 3000-base-pair sequences of nuclear rDNA (partial 28S) and mtDNA ( partial cox1, nad6, 12S) strongly supports the status of Schistosoma kisumuensis as a new species and as a sister species of S. intercalatum.
CA88, a nuclear repetitive DNA sequence identified in Schistosoma mansoni, aids in the genotyping of nine Schistosoma species of medical and veterinary importance.
Results support the use of these markers in studying the population dynamics of Schistosoma isolates from endemic areas and also provide new methods for investigating the relationships between different populations of parasites.
An Overview of Schistosomiasis in Africa: Evolutional Origin and Diagnostic Challenges
Diagnosis is a key to all aspects of schistosomiasis and decision on individual and community treatment, estimations on prognosis and Review Article Hudu and Umar; AJMAH, 17(2): 1-12, 2019; Article no.52646 2 appraisal of dismalness, assessment of chemotherapy and control estimates all require the outcomes from diagnostic tests.
Population genetics of Schistosoma haematobium: development of novel microsatellite markers and their application to schistosomiasis control in Mali
A novel microsatellite tool-kit is reported allowing, for the first time, robust genetic analysis of individual S. haematobium larvae collected directly from infected human hosts, in the Ségou region of Mali, the first micros satellite study of this highly neglected parasite.
Applying evolutionary genetics to schistosome epidemiology.
  • M. Steinauer, M. Blouin, C. Criscione
  • Biology
    Infection, genetics and evolution : journal of molecular epidemiology and evolutionary genetics in infectious diseases
  • 2010


The phylogeny of the Schistosomatidae based on three genes with emphasis on the interrelationships of Schistosoma Weinland, 1858
The principal findings are that Ornithobilharzia and AustrobilHarzia form a sister group to the Schistosoma; mammalian schistosomes appear paraphyletic and 2 TrichobilharZia species, T. ocellata and T. szidati, seem to be synonymous.
Molecular phylogenetics of the four Schistosoma species groups determined with partial 28S ribosomal RNA gene sequences
Results confirm a phylogeny previously suggested by 18S rRNA gene sequences, corroborating the status of S. spindale as a sister taxon to S. haematobium, and demonstrate the utility of 28S r RNA gene sequence data for resolving phylogenies within the Schistosomatidae.
Changes in mitochondrial genetic codes as phylogenetic characters: two examples from the flatworms.
A rapid computerized method for analyzing genetic codes is developed and demonstrated the wide phylogenetic distribution of the standard invertebrate code as well as confirming already known metazoan deviations from it (ascidian, vertebrate, echinoderm/hemichordate).
Hybridization between different strains of Schistosoma intercalatum Fisher, 1934 from Cameroun and Zaïre
The viability of the four cross-breeding experimentas carried out (two with each combinations of the parental strains) were low and it was only possible to obtain F2–cercariae, which developed in both parental intermediate hosts.
Schistosomiasis in the Republic of São Tomé and Principe: characterization of Schistosoma intercalatum.
Lack of prezygotic isolation by assortative mating between the two cryptic species of the polytypic Schistosoma intercalatum taxon
The data demonstrate that there were no significant differences between the number of homospecific pairs observed compared with the expected number under the null hypothesis, indicating that the reinforcement of a prezygotic isolating mechanism does not play a significant role in the speciation process.
Experimental evidence of hybrid breakdown between the two geographical strains of Schistosoma intercalatum
The sterility of the F4 hybrid sporocyst supports the concept of the existence of 2 distinct taxa, and there is a post-zygotic barrier in the crosses of S.intercalatum Zaire and S. intercalatum Cameroon from the F2 generations onwards.
Observations onSchistosoma intercalatum in south-east gabon
The sum of characters indicates that Schistosoma intercalatum as known from south-east Gabon belongs to the strain found in Cameroun and western Gabon, rather than to the strains known from Zaire.