A preliminary analysis of the population genetics and molecular phylogenetics of Onchocerca volvulus (Nematoda: Filarioidea) using nuclear ribosomal second internal transcribed spacer sequences
Mem. Inst. Oswaldo Cruz
;
102(7): 879-882, Nov. 2007. ilus, tab
Article
in English
| LILACS
| ID: lil-470351
ABSTRACT
Nuclear internal transcribed spacer 2 (ITS2) rDNA sequences were used for a molecular phylogenetics analysis of five Onchocerca species. The sister species of the human parasite O. volvulus was found to be the cattle parasite O. ochengi and not O. gibsoni, contrary to chromosomal evidence. The genetic differentiation of two African populations (representing the two African strains) and a Brazilian population of O. volvulus was also studied. Phylogenetic and network reconstruction did not show any clustering of ITS2 alleles on geographic or strain grounds. Furthermore, population genetics tests showed no indication of population differentiation but suggested gene flow among the three populations.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Transcription, Genetic
/
Genetic Variation
/
Onchocerca volvulus
/
DNA, Helminth
/
DNA, Ribosomal Spacer
Limits:
Animals
/
Humans
Language:
English
Journal:
Mem. Inst. Oswaldo Cruz
Journal subject:
Tropical Medicine
/
Parasitology
Year:
2007
Type:
Article
Affiliation country:
Portugal
/
United kingdom
Institution/Affiliation country:
The Natural History Museum/GB
/
Universidade do Porto/PT
/
University of Greenwich at Medway/GB
Similar
MEDLINE
...
LILACS
LIS