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
Artigo
em Inglês
| 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.
Texto completo:
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Índice:
LILACS (Américas)
Assunto principal:
Transcrição Gênica
/
Variação Genética
/
Onchocerca volvulus
/
DNA de Helmintos
/
DNA Espaçador Ribossômico
Limite:
Animais
/
Humanos
Idioma:
Inglês
Revista:
Mem. Inst. Oswaldo Cruz
Assunto da revista:
Medicina Tropical
/
Parasitologia
Ano de publicação:
2007
Tipo de documento:
Artigo
País de afiliação:
Portugal
/
Reino Unido
Instituição/País de afiliação:
The Natural History Museum/GB
/
Universidade do Porto/PT
/
University of Greenwich at Medway/GB
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