Effect of Repeated Application of Microbial Larvicides on Malaria Transmission in Central Côte d'Ivoire

2009 ◽  
Vol 25 (3) ◽  
pp. 382-385 ◽  
Author(s):  
Emile S. Tchicaya ◽  
Benjamin G. Koudou ◽  
Jennifer Keiser ◽  
Akré M. Adja ◽  
Gueladio Cissé ◽  
...  
Keyword(s):  
Malaria Transmission ◽  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
Repeated Application ◽  
Cote D’Ivoire ◽  
Côte D'ivoire

Effects of seasonality and irrigation on malaria transmission in two villages in Côte d'Ivoire

2010 ◽  
Vol 104 (2) ◽  
pp. 109-121 ◽  
Author(s):  
B. G. Koudou ◽  
M. Doumbia ◽  
N. Janmohamed ◽  
A. B. Tschannen ◽  
M. Tanner ◽  
...  
Keyword(s):  
Malaria Transmission ◽  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
Cote D’Ivoire ◽  
Côte D'ivoire

scholarly journals Anopheles bionomics, insecticide resistance mechanisms, and malaria transmission in the Korhogo area, northern Côte d’Ivoire: a pre-intervention study

Parasite ◽  
2019 ◽  
Vol 26 ◽  
pp. 40 ◽  
Author(s):  
Barnabas Zogo ◽  
Dieudonné Diloma Soma ◽  
Bertin N’Cho Tchiekoi ◽  
Anthony Somé ◽  
Ludovic P. Ahoua Alou ◽  
...  
Keyword(s):  
Insecticide Resistance ◽  
Anopheles Gambiae ◽  
Malaria Transmission ◽  
Cote D'ivoire ◽  
Rainy Season ◽  
Côte D’Ivoire ◽  
Resistance Mechanisms ◽  
Effective Control ◽  
Cote D’Ivoire ◽  
Côte D'ivoire

A better understanding of malaria transmission at a local scale is essential for developing and implementing effective control strategies. In the framework of a randomized controlled trial (RCT), we aimed to provide an updated description of malaria transmission in the Korhogo area, northern Côte d’Ivoire, and to obtain baseline data for the trial. We performed human landing collections (HLCs) in 26 villages in the Korhogo area during the rainy season (September–October 2016, April–May 2017) and the dry season (November–December 2016, February–March 2017). We used PCR techniques to ascertain the species of the Anopheles gambiae complex, Plasmodium falciparum sporozoite infection, and insecticide resistance mechanisms in a subset of Anopheles vectors. Anopheles gambiae s.l. was the predominant malaria vector in the Korhogo area. Overall, more vectors were collected outdoors than indoors (p < 0.001). Of the 774 An. gambiae s.l. tested in the laboratory, 89.65% were An. gambiae s.s. and 10.35% were An. coluzzii. The frequencies of the kdr allele were very high in An. gambiae s.s. but the ace-1 allele was found at moderate frequencies. An unprotected individual living in the Korhogo area received an average of 9.04, 0.63, 0.06 and 0.12 infected bites per night in September–October, November–December, February–March, and April–May, respectively. These results demonstrate that the intensity of malaria transmission is extremely high in the Korhogo area, especially during the rainy season. Malaria control in highly endemic areas such as Korhogo needs to be strengthened with complementary tools in order to reduce the burden of the disease.

Vectorial Transmission of Malaria in Major Districts of Côte d’Ivoire

2019 ◽  
Vol 57 (3) ◽  
pp. 908-914
Author(s):  
Konan F Assouho ◽  
Akré M Adja ◽  
Négnorogo Guindo-Coulibaly ◽  
Emmanuel Tia ◽  
Affoué M N Kouadio ◽  
...  
Keyword(s):  
Malaria Transmission ◽  
Mass Distribution ◽  
Cote D'ivoire ◽  
Rural Areas ◽  
Urban Areas ◽  
Côte D’Ivoire ◽  
Anopheles Funestus ◽  
Malaria Vectors ◽  
Cote D’Ivoire ◽  
Côte D'ivoire

Abstract To better understand the influence of periodic mass distribution of Long-Lasting Insecticidal Nets (LLINs) on malaria transmission, a 1-yr entomological survey was conducted in three major districts of Côte d’Ivoire. Mosquitoes were sampled by Human Landing Catches (HLC) in urban and rural areas of San Pedro and Abidjan (coastal), and in Yamoussoukro (central). Mosquitoes were identified morphologically and by molecular methods. The Plasmodium falciparum circumsporozoite (CSP) indices were measured by ELISA, and the Entomological Inoculation Rates (EIR) were calculated for each species and area. Anopheles gambiae s.l. Giles (Diptera: Culicidae) and Anopheles nili Theobald (Diptera: Culicidae) were identified in coastal districts, while An. gambiae s.l. and Anopheles funestus Giles (Diptera: Culicidae) were reported in the central district. In urban areas, malaria vectors showed a low aggressiveness (&lt;10 bites per person per night), except in Yamoussoukro, where up to 18.9 b/p/n were recorded. The annual EIR was higher in the central urban area (138.7 infected bites per person per year) than in coastal ones (10–62 ib/p/n). In rural areas, malaria vectors were highly aggressive with an average 13 b/p/n for An. gambiae s.l, 21.2 b/p/n for An. nili and 12 b/p/n for An. funestus. The annual EIR ranged between 94.9 and 193.4 infected bites per person per year. This work indicates that, despite repeated mass distribution of LLINs, malaria transmission remains high and heterogeneous across Côte d’Ivoire. Malaria transmission was lower in coastal urban areas than in the central one, and remains high rural areas where two additional Anopheles vectors are involved in malaria transmission.

scholarly journals Spatial targeting of Screening + Eave tubes (SET), a house-based malaria control intervention, in Côte d’Ivoire: A geostatistical modelling study

2021 ◽  
Vol 1 (11) ◽  
pp. e0000030
Author(s):  
Tiago Canelas ◽  
Edward Thomsen ◽  
Daniel McDermott ◽  
Eleanore Sternberg ◽  
Matthew B. Thomas ◽  
...  
Keyword(s):  
Malaria Transmission ◽  
Malaria Control ◽  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
Controlled Trial ◽  
Cluster Randomised Controlled Trial ◽  
Clinical Malaria ◽  
Cote D’Ivoire ◽  
Côte D'ivoire ◽  
Ground Truthing

New malaria control tools and tailoring interventions to local contexts are needed to reduce the malaria burden and meet global goals. The housing modification, screening plus a targeted house-based insecticide delivery system called the In2Care® Eave Tubes, has been shown to reduce clinical malaria in a large cluster randomised controlled trial. However, the widescale suitability of this approach is unknown. We aimed to predict household suitability and define the most appropriate locations for ground-truthing where Screening + Eave Tubes (SET) could be implemented across Côte d’Ivoire. We classified DHS sampled households into suitable for SET based on the walls and roof materials. We fitted a Bayesian beta-binomial logistic model using the integrated nested Laplace approximation (INLA) to predict suitability of SET and to define priority locations for ground-truthing and to calculate the potential population coverage and costs. Based on currently available data on house type and malaria infection rate, 31% of the total population and 17.5% of the population in areas of high malaria transmission live in areas suitable for SET. The estimated cost of implementing SET in suitable high malaria transmission areas would be $46m ($13m –$108m). Ground-truthing and more studies should be conducted to evaluate the efficacy and feasibility of SET in these settings. The study provides an example of implementing strategies to reflect local socio-economic and epidemiological factors, and move beyond blanket, one-size-fits-all strategies.

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