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Onchocerciasis transmission by the Bioko form of Simulium yahense Vajime & Dunbar 1975 (Diptera: Simuliidae)

Onchocerciasis transmission by the Bioko form of Simulium yahense Vajime & Dunbar 1975 (Diptera: Simuliidae)

Cheke, Robert A. ORCID: 0000-0002-7437-1934, Tirados, Iñaki, Mas, Jordi, Geenan, Petra, Adjaru, Jose Manuel Mba, Bouaha, Juan Luis Alfonso, Sima, Anacleto Nsue, Meyer, Rolf R.F. and Wilson, Michael D. (2006) Onchocerciasis transmission by the Bioko form of Simulium yahense Vajime & Dunbar 1975 (Diptera: Simuliidae). Studia dipterologica supplement, 14. pp. 26-30. ISSN 1433-4968 (doi:3-932795-23-7)

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Abstract

The vectorial abilities of the endemic form of Simlium yahense VAJLME & DUNBAR,1975 that occurs on the island of Bioko, Equatorial Guinea, were investigated in relation to ivermectin treatments.
Although ivermectin has been administered in Bioko since 1990, coverage remains low with about
half the island's population treated. There were no data on levels of parasitism with Onchocerca
volvulus in Simulium yahense collected prior to the treatments, although one data-set from a site at
Sampaca is based on flies collected in 1993. These data on transmission rates were compared with
more recent ones at Sampaca, which did not show any evidence of a decrease. Data from two other
sites (Balacha de Riaba and Musola) collected during the African Programme for Onchocerciasis
Control (APOC) project in 1999-2001 did not show any evidence of declines in transmission rates
either, but three of four transmission indices measured at Barleycorn did decrease. Transmission rates
(ATPs of398-2161) and levels of parasitism in the flies (means of7.7 LlIL2 per fly with LIIL2 and
4.4 L3 in the head per fly with L3 in the head) were typical for the West African forest zone

Item Type: Article
Additional Information: [1]Studia dipterologica supplement is edited by Andreas Stark and Frank Menzel [2] Supplement 14 has the following title Papers on the taxonomy, ecology and biology of black flies (Diptera: Simuliidae). Proceedings of the International Symposium on Simuliidae, Berlin 2004. The collection editor is Doreen Werner (ISBN: 3-932795-23-7).
Uncontrolled Keywords: Onchocerciasis, Onchocerca volvulus, transmission, Bioko, Equatorial Guinea, Simulium yahense
Subjects: Q Science > Q Science (General)
R Medicine > RA Public aspects of medicine > RA0421 Public health. Hygiene. Preventive Medicine
Q Science > QR Microbiology
Faculty / Department / Research Group: Faculty of Engineering & Science > Natural Resources Institute
Faculty of Engineering & Science > Natural Resources Institute > Agriculture, Health & Environment Department
Related URLs:
Last Modified: 11 Nov 2011 12:06
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
URI: http://gala.gre.ac.uk/id/eprint/3170

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