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International Journal of Innovation and Applied Studies
ISSN: 2028-9324     CODEN: IJIABO     OCLC Number: 828807274     ZDB-ID: 2703985-7
 
 
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Seasonal distribution of Aedes aegypti in southern Benin: a risk of dengue virus transmission to urban populations


Volume 9, Issue 2, November 2014, Pages 648–654

 Seasonal distribution of Aedes aegypti in southern Benin: a risk of dengue virus transmission to urban populations

Anges Yadouleton1, Ramziyath Agbanrin2, C. Vodounon3, G. padonou4, K. Badirou5, R. Attolou6, Fabrice Ursins7, Jacques Zola8, H. Allagbé9, and M. Akogbéto10

1 Centre de Recherche Entomologique de Cotonou, Benin
2 Centre de Recherche Entomologique de Cotonou (CREC), 06 BP 2604 Cotonou, Benin
3 Ecole Normale Supérieure de Natitingou-Université de Parakou, Benin
4 Centre de Recherche Entomologique de Cotonou (CREC), 06 BP 2604 Cotonou, Benin
5 Centre de Recherche Entomologique de Cotonou (CREC), 06 BP 2604 Cotonou, Benin
6 Centre de Recherche Entomologique de Cotonou (CREC), 06 BP 2604 Cotonou, Benin
7 Centre de Recherche Entomologique de Cotonou (CREC), 06 BP 2604 Cotonou, Benin
8 Centre de Recherche Entomologique de Cotonou (CREC), 06 BP 2604 Cotonou, Benin
9 Centre de Recherche Entomologique de Cotonou (CREC), 06 BP 2604 Cotonou, Benin
10 Centre de Recherche Entomologique de Cotonou (CREC), 06 BP 2604 Cotonou, Benin

Original language: English

Received 30 September 2014

Copyright © 2014 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract


Background: Aedes aegypti is present year round in several cities of the Republic of Benin. This study aims to assess the seasonal distribution of this mosquito at Dandji, in southern Benin.
Method: A cross seasonal entomological study on larvae and adults of Ae. aegypti was carried out from May 2013 to April 2014 in southern Benin (Dandji). The study was based on sampling Ae. aegypti immature stages (larvae/pupae) from domestic, peri-domestic and natural water sources and were reared to adults. The collections were made during the dry and rainy seasons. Addional Ae. aegypti were collected by Human Landing Catches (HLC), Indoor Pyrethrum Spray Catches (PSC), Biogents (BG) sentinel trap and Gravid traps (GT).
Results: During the year of study, a total number of 18,658 mosquitoes were collected where 15,204 were collected by HLC; 303 with BG trap, 3,038 with PSC, 48 with the GT. Among the 18, 593 of Ae. aegypti collected, the female populations (13,834) was significantly higher than the male populations (p<0.05). From the 13,834 females, 1,380 were blood-fed.
Adult's collection was high during the two rainy seasons (June to July and October to November) but declined in the two dry seasons (December to March and August to September).
At Dandji, the average of Human Biting Rates (HBR) obtained during the rainy seasons (79.6 bites/p/n) was significantly higher than those obtained during the dry seasons (58.62 bites/p/n) (p < 0.05).
Conclusion: These findings showed the presence of Aedes aegypti year round at Dandji in southern Benin. This presence is strengthening with the trade of second hand tires which are good breeding sites for the development of Ae. aegypti. Data on blood feeding patterns of Ae. aegypti collected during this study will certainly provide valuable information about potential Dengue virus (DENV) hosts others than humans and will help to get a greater understanding about DENV ecology in Benin. It is therefore crucial for health authorities of Benin to develop a program to fight against this mosquito in order to avoid an outbreak of DENV as it was the case in many sub Saharan Africa countries recently.

Author Keywords: Aedes aegypti, season, traps, tires, Benin.


How to Cite this Article


Anges Yadouleton, Ramziyath Agbanrin, C. Vodounon, G. padonou, K. Badirou, R. Attolou, Fabrice Ursins, Jacques Zola, H. Allagbé, and M. Akogbéto, “Seasonal distribution of Aedes aegypti in southern Benin: a risk of dengue virus transmission to urban populations,” International Journal of Innovation and Applied Studies, vol. 9, no. 2, pp. 648–654, November 2014.