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Biting behaviour of Simulium damnosum complex and Onchocerca volvulus infection along the Osun River, Southwest Nigeria

BACKGROUND: Studies on biting behaviours and infectivity status of insect vectors are pre-requisites in understanding the epidemiology of the vector- borne diseases and planning effective control measures. A longitudinal study was carried out to investigate the transmission index of Simulium damnosu...

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Autores principales: Adeleke, Monsuru A, Mafiana, Chiedu F, Sam-Wobo, Sammy O, Olatunde, Ganiyu O, Ekpo, Uwem F, Akinwale, Olaoluwa P, Toe, Laurent
Formato: Texto
Lenguaje:English
Publicado: BioMed Central 2010
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2959032/
https://www.ncbi.nlm.nih.gov/pubmed/20929573
http://dx.doi.org/10.1186/1756-3305-3-93
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author Adeleke, Monsuru A
Mafiana, Chiedu F
Sam-Wobo, Sammy O
Olatunde, Ganiyu O
Ekpo, Uwem F
Akinwale, Olaoluwa P
Toe, Laurent
author_facet Adeleke, Monsuru A
Mafiana, Chiedu F
Sam-Wobo, Sammy O
Olatunde, Ganiyu O
Ekpo, Uwem F
Akinwale, Olaoluwa P
Toe, Laurent
author_sort Adeleke, Monsuru A
collection PubMed
description BACKGROUND: Studies on biting behaviours and infectivity status of insect vectors are pre-requisites in understanding the epidemiology of the vector- borne diseases and planning effective control measures. A longitudinal study was carried out to investigate the transmission index of Simulium damnosum complex species along Osun River, South Western Nigeria. Adult flies were collected on human attractants from 07:00 to 18:00 hours for two consecutive days from February 2008 to June 2009 at three communities: Osun Eleja, Osun Ogbere and Osun Budepo. The infectivity rate was determined by dissection and Polymerase Chain Reaction amplification (PCR) of 0-150 genes of Onchocerca parasite using the pool screening technique. RESULTS: The results indicated that the majority of the flies collected at the three sampling points were nulliparous as they accounted for 53.90%, 57.86% and 59.58% of the flies dissected at Osun Budepo, Osun Ogbere and Osun Eleja, respectively. The parous rate was higher during the dry season than the wet season but the difference was not statistically significant (p < 0.05). The biting activity of the parous flies showed two peaks at Osun Budepo and three peaks at Osun Eleja and Osun Ogbere. Of the 1,472 flies dissected and 1,235 flies screened by molecular method, none was infected with Onchocerca parasite at the three sampling points however the annual biting rates at the three communities were higher than 1,000 considered as tolerable value for a person living in an onchocerciasis zone by Word Health Organization. CONCLUSION: The study has provided the baseline data for further study on onchocerciasis transmission dynamics and the need to intercept man- simuliid vector contact at the study area.
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spelling pubmed-29590322010-10-22 Biting behaviour of Simulium damnosum complex and Onchocerca volvulus infection along the Osun River, Southwest Nigeria Adeleke, Monsuru A Mafiana, Chiedu F Sam-Wobo, Sammy O Olatunde, Ganiyu O Ekpo, Uwem F Akinwale, Olaoluwa P Toe, Laurent Parasit Vectors Research BACKGROUND: Studies on biting behaviours and infectivity status of insect vectors are pre-requisites in understanding the epidemiology of the vector- borne diseases and planning effective control measures. A longitudinal study was carried out to investigate the transmission index of Simulium damnosum complex species along Osun River, South Western Nigeria. Adult flies were collected on human attractants from 07:00 to 18:00 hours for two consecutive days from February 2008 to June 2009 at three communities: Osun Eleja, Osun Ogbere and Osun Budepo. The infectivity rate was determined by dissection and Polymerase Chain Reaction amplification (PCR) of 0-150 genes of Onchocerca parasite using the pool screening technique. RESULTS: The results indicated that the majority of the flies collected at the three sampling points were nulliparous as they accounted for 53.90%, 57.86% and 59.58% of the flies dissected at Osun Budepo, Osun Ogbere and Osun Eleja, respectively. The parous rate was higher during the dry season than the wet season but the difference was not statistically significant (p < 0.05). The biting activity of the parous flies showed two peaks at Osun Budepo and three peaks at Osun Eleja and Osun Ogbere. Of the 1,472 flies dissected and 1,235 flies screened by molecular method, none was infected with Onchocerca parasite at the three sampling points however the annual biting rates at the three communities were higher than 1,000 considered as tolerable value for a person living in an onchocerciasis zone by Word Health Organization. CONCLUSION: The study has provided the baseline data for further study on onchocerciasis transmission dynamics and the need to intercept man- simuliid vector contact at the study area. BioMed Central 2010-10-07 /pmc/articles/PMC2959032/ /pubmed/20929573 http://dx.doi.org/10.1186/1756-3305-3-93 Text en Copyright ©2010 Adeleke et al; licensee BioMed Central Ltd. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research
Adeleke, Monsuru A
Mafiana, Chiedu F
Sam-Wobo, Sammy O
Olatunde, Ganiyu O
Ekpo, Uwem F
Akinwale, Olaoluwa P
Toe, Laurent
Biting behaviour of Simulium damnosum complex and Onchocerca volvulus infection along the Osun River, Southwest Nigeria
title Biting behaviour of Simulium damnosum complex and Onchocerca volvulus infection along the Osun River, Southwest Nigeria
title_full Biting behaviour of Simulium damnosum complex and Onchocerca volvulus infection along the Osun River, Southwest Nigeria
title_fullStr Biting behaviour of Simulium damnosum complex and Onchocerca volvulus infection along the Osun River, Southwest Nigeria
title_full_unstemmed Biting behaviour of Simulium damnosum complex and Onchocerca volvulus infection along the Osun River, Southwest Nigeria
title_short Biting behaviour of Simulium damnosum complex and Onchocerca volvulus infection along the Osun River, Southwest Nigeria
title_sort biting behaviour of simulium damnosum complex and onchocerca volvulus infection along the osun river, southwest nigeria
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2959032/
https://www.ncbi.nlm.nih.gov/pubmed/20929573
http://dx.doi.org/10.1186/1756-3305-3-93
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