Investigations entomologiques menées autour de dix cas de fièvre jaune survenus en 2009 dans la région sanitaire du Denguélé, Côte-d’Ivoire

Abstract

In November 2009, ten suspicious cases of yellow fever, including six deaths, were notified in the region of Denguélé, in the northwest of Côte-d'Ivoire. In order to evaluate the extent of yellow fever virus circulation and the risk for local people, a mission of entomological investigation was carried out by the Ministry of Health and Public Hygiene of Côte-d'Ivoire. Entomological investigations were conducted in the villages of confirmed cases (Banakoro and Tron-Touba) and the centers of consultation and hospitalization of cases during illness. Breteau index and recipient index were quasi nil. Aedes aegypti was absent among the captured mosquitoes. On the other hand, Aedes luteocephalus and Aedes opok were present at Banakoro and Tron-Touba with respective average biting rates of 0.8 and 0.6 bite/man/twilight. This situation of epidemic in the northwest of Côte-d'Ivoire could be explained by the deterioration of Denguélé region's health system which is a consequence of the war started in the country in 2002 and which has lowered the immunity of the population.

Oviposition ecology and species composition of Aedes spp. and Aedes aegypti dynamics in variously urbanized settings in arbovirus foci in southeastern Côte d’Ivoire

“…However, the sudden decline of Aedes spp. numbers in October 2013 in the urban setting might be due to heavy precipitations and exacerbated flushing of their eggs because of the lack of protective vegetation in the built-up environment [ 51 ].…”

Seasonal variation and intra urban heterogeneity of the entomological risk of transmission of dengue and yellow fever in Abidjan, Côte d'Ivoire

“…The study also showed that A. aegypti colonizes practically all kinds of containers in the immediate environment of humans, particularly water storage ones. These containers, which constitute the main breeding sites for this vector (Konan et al, 2011; Koné et al, 2013; Tezzo et al, 2021), are constantly used by the population of Abidjan to store water because of the inadequacy of the water supply network to serve a continuously growing population (Office National de l'Eau Potable, 2017). After water storage containers used tires represented the second most important category of breeding sites in terms of frequency.…”

“…In Côte d'Ivoire, after the first case of dengue virus serotype 3 in 2008 (World Health Organization [WHO], 2009), several other studies have reported the presence of this arbovirus in the country (Akoua‐Koffi et al, 2011; Aoussi et al, 2014; L'Azou et al, 2015; Moi et al, 2010; WHO, 2017). The country has also known since 2008, a resurgence of yellow fever (Attoh‐Touré et al, 2010; Konan et al, 2009) and Zika was also reported (Akoua‐Koffi et al, 2001).…”

Gestion de l'épidémie de fièvre jaune en 2010 à Séguéla (Côte d'Ivoire) : intérêt d'une investigation pluridisciplinaire

“…En 2008, la ville d' Abidjan a été confrontée à une épidémie de fièvre jaune après celle de 2001 [4]. En 2009, dix cas dont sept suspects et trois détectés positifs ont été notifiés dans les districts sanitaires de Minignan et d'Odienné au Nord-Ouest du pays [5]. L'année suivante, trois cas positifs aux IgM antiamaril et décédés ont été notifiés dans le district sanitaire de Séguéla.…”