CJO - Abstract - The current status of onchocerciasis in the forest/savanna transition zone of Côte d'Ivoire

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    The current status of onchocerciasis in the forest/savanna transition zone of Côte d'Ivoire
    A. G. ADJAMI, L. TOÉ, Y. BISSAN, S. BUGRI, L. YAMÉOGO, M. KONE, C. R. KATHOLI and T. R. UNNASCH (2004).
    Parasitology, Volume 128, Issue 04, April 2004 pp 407-414 http://journals.cambridge.org/action/displayAbstract?aid=213860

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Parasitology (2004), 128 : 407-414 Cambridge University Press
Copyright © 2004 Cambridge University Press
doi:10.1017/S0031182003004724 (About doi)
Published online by Cambridge University Press 16 Apr 2004
 
Parasitology (2004), 128:4:407-414 Cambridge University Press
Copyright © 2004 Cambridge University Press
doi:10.1017/S0031182003004724

The current status of onchocerciasis in the forest/savanna transition zone of Côte d'Ivoire

A. G. ADJAMI a1, L. TOÉ a1, Y. BISSAN a1, S. BUGRI a1, L. YAMÉOGO a2, M. KONE a3, C. R. KATHOLI a4 and T. R. UNNASCH a5c1
a1 Multi Disease Surveillance Centre, World Health Organization, B.P. 549, Ouagadougou, Burkina Faso
a2 African Programme for Onchocerciasis Control, World Health Organization, B.P. 549, Ouagadougou, Burkina Faso
a3 Centre Pierre Richet, B.P. 1500, Bouake 01, Côte d'Ivoire
a4 Department of Biostatistics, University of Alabama at Birmingham, 1530 3rd Avenue South, Birmingham AL 35294, USA
a5 Division of Geographic Medicine, University of Alabama at Birmingham, 1530 3rd Avenue South, Birmingham AL 35294, USA

Article author query
adjami a   PubMedGoogle Scholar 
toe l   PubMedGoogle Scholar 
bissan y   PubMedGoogle Scholar 
bugri s   PubMedGoogle Scholar 
yameogo l   PubMedGoogle Scholar 
kone m   PubMedGoogle Scholar 
katholi c   PubMedGoogle Scholar 
unnasch t   PubMedGoogle Scholar 

Abstract

Onchocerca volvulus exists in at least two strains in West Africa, while its black-fly vectors consist of sibling species, dwelling in the savanna and forest/transition zones. In transition and degraded forest zones both parasite strains and different sibling species of the vector can be sympatric. The strain of parasite in infected humans and in vector black-flies was determined in two bioclimes along the Bandama river of Côte d'Ivoire. The upper Bandama is located in the savanna bioclime while the Middle Bandama is located in a degraded forest zone. At both sites, savanna-dwelling sibling species of the Simulium damnosum sensu lato species complex predominated. The severe-strain of O. volvulus was the predominant strain at both sites. However, severe-strain parasites represented a significantly larger proportion of those found in the vector population than in the human population in the degraded forest of the Middle Bandama. These data suggest that in degraded forest areas recently invaded by savanna-dwelling species of S. damnosum s.l. transmission of the severe-strain of the parasite might be more efficient than transmission of the mild-strain.

(Received September 11 2003)
(Revised October 15 2003)
(Accepted October 15 2003)


Key Words: Onchocerca volvulus; Simulium damnosum; strain; West Africa; river blindness.

Correspondence:
c1 University of Alabama at Birmingham, Division of Geographic Medicine, BBRB 203, 1530 3rd Avenue South, Birmingham, AL 35294-2170, USA. Tel: +1 205 975 7601. Fax: +1 205 934 5600. E-mail: trunnasch@geomed.dom.uab.edu

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