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Onchocerca volvulus: genetic diversity of parasite isolates from Sudan.
- Source :
-
Experimental parasitology [Exp Parasitol] 2001 Jan; Vol. 97 (1), pp. 24-34. - Publication Year :
- 2001
-
Abstract
- Onchocerciasis in Sudan exists in three distinct foci which exhibit differing clinical presentations. Previous studies have demonstrated that a tandemly repeated Onchocerca sequence family with a unit repeat length of 150 bp (the O-150 family) is a useful marker for deducing relationships among different O. volvulus populations. In the current study, the O-150 repeat families of O. volvulus from Sudan were analyzed and compared to each other and to those of parasites from West Africa. Similar to West African and American O. volvulus, the O-150 families of the Sudanese parasites could be divided into clusters within which little or no intracluster variation was evident, suggesting that the O-150 family in these parasites was subject to the forces of concerted evolution. Statistical analysis of the O-150 families from the different Sudanese parasite isolates, employing a nested algorithm based on an analysis of variance, revealed that O. volvulus endemic to the northern focus at Abu Hamed were significantly different from all other O. volvulus populations examined to date. In contrast, parasites from the southern and eastern foci of Sudan were indistinguishable from those endemic to the West African savanna. The significance of these data are discussed in light of knowledge of the biogeography and biology of transmission of O. volvulus in Africa.<br /> (Copyright 2001 Academic Press.)
- Subjects :
- Africa, Western
Analysis of Variance
Animals
Base Sequence
Cloning, Molecular
Cluster Analysis
Consensus Sequence
DNA, Helminth chemistry
Humans
Molecular Sequence Data
Polymerase Chain Reaction
Sequence Alignment
Sudan
Tandem Repeat Sequences
Yemen
Genetic Variation
Onchocerca volvulus genetics
Onchocerciasis parasitology
Subjects
Details
- Language :
- English
- ISSN :
- 0014-4894
- Volume :
- 97
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Experimental parasitology
- Publication Type :
- Academic Journal
- Accession number :
- 11207111
- Full Text :
- https://doi.org/10.1006/expr.2000.4589