Species composition and population dynamics ofAedesmosquitoes, potential vectors of arboviruses, at the container terminal of the autonomous port of Abidjan, Côte d’Ivoire

Yao Lucien Konan,Julien Marie-Christian Doannio,Atiuomounan Blaise Koné,Zanakoungo Ibrahim Coulibaly,Kouadio Daniel Ekra,Paul Odéhouri-Koudou,Mirielle Dosso

doi:10.1051/parasite/2013013

Abstract

An entomological survey of Aedes mosquitoes was initiated at the container terminal of the Autonomous Port of Abidjan in 2009 following the occurrence of two outbreaks of yellow fever in less than 10 years and dengue cases reported in 2008 among expatriates returning from Côte d’Ivoire (Ivory Coast). It was based on regular monitoring of ovitraps from July 2009 to June 2010. A total of 4,739 adult mosquitoes represented by four species of Aedes (97% of total) and one unexpected species of Culex (3%) were obtained. Aedes aegypti was dominant with 98% of total Aedes (n = 4,594). Its density variation was closely related to the amount of rainfall. The other species of Aedes were collected in the second half of the major rainy season including Ae. albopictus (1.17% of Aedes) and Ae. angustus (0.13%) whose presence was discovered for the first time in Côte d’Ivoire.

Highlights

Diseases which have been known for a long time such as yellow fever and dengue are currently reappearing in many parts of the world due to economic and social deterioration and public health systems in these countries [16]
From July 2009 to June 2010, a total of 4,739 adult mosquitoes (48.7% females, 51.3% males) were obtained at the Container Terminal of the Autonomous Port of Abidjan (Table 1). This population was dominated by Aedes species which constituted 96.94% of the emergences
The average number of Aedes was 4.6 specimens per paddle (S/Pl) for the study period with a minimum of 2.8 S/Pl collected at the Workshop and a maximum of 7.6 S/Pl at the Cold park (Table 2)

Summary

Introduction

Diseases which have been known for a long time such as yellow fever and dengue are currently reappearing in many parts of the world due to economic and social deterioration and public health systems in these countries [16]. The annual incidence of dengue has been multiplied by 30 during the last 50 years with increasing number of cases which has become exponential in the last 15 years [27] This pathology is part of the diseases of traveler’s returning from the tropics [9]. A second infection by another serotype causes a higher risk of dengue hemorrhagic fever, which is a more severe form of the disease [7]. Yellow fever and dengue are viral infectious diseases transmitted by mosquitoes of the genus Aedes. These mosquitoes have the particularity of eggs that resist drought, a condition that allows them to survive prolonged journey by sea, air, and land. This factor has enabled them to spread worldwide [5]

Methods

Results

Discussion

Conclusion