Spatiotemporal analysis of dengue fever in Burkina Faso from 2016 to 2019

Ouattara, Cheick Ahmed; Traore, Seydou; Sangaré, Ibrahim; Traoré, Isidore; Mèda, Zièmlé Clément; Savadogo, Léon G. Blaise

doi:10.1186/s12889-022-12820-x

Cited by 14 publications

(14 citation statements)

References 22 publications

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“…The worldwide emergence of arboviruses, such as DENV, represents a major public health concern on the African continent where 34 countries are considered to be endemic for dengue [3]. Successive dengue outbreaks have been recorded since 2013 in the city of Ouagadougou (Burkina Faso) [4][5][6][7], with the outbreak of 2016-2017 being the most important to date [8,9].…”

Section: Introductionmentioning

confidence: 99%

Impact of physicochemical parameters of Aedes aegypti breeding habitats on mosquito productivity and the size of emerged adult mosquitoes in Ouagadougou City, Burkina Faso

et al. 2022

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Background Outbreaks of dengue fever caused by viruses transmitted by Aedes aegypti mosquitoes are repeated occurrences in West Africa. In recent years, Burkina Faso has experienced major dengue outbreaks, most notably in 2016 and 2017 when 80% of cases were recorded in Ouagadougou City (Central Health Region). In order to better understand the ecology of this vector and to provide information for use in developing control measures, a study on the characteristics of Aedes container breeding sites and the productivity of such sites, as measured by the abundance of immature stages and resultant adult body size, was undertaken in three health districts (Baskuy, Bogodogo and Nongremassom) of Ouagadougou. Methods Adult mosquitoes were collected indoors and outdoors in 643 households during the rainy season from August to October 2018. The presence of water containers was systematically recorded and the containers examined for the presence or absence of larvae. Characteristics of the container breeding sites, including size of the container and temperature, pH and conductivity of the water contained within, were recorded as well as the volume of water. Traditional Stegomyia indices were calculated as quantitative indicators of the risk of dengue outbreaks; generalised mixed models were fitted to larval and pupal densities, and the contribution of each covariate to the model was evaluated by the Z-value and associated P-value. Results A total of 1061 container breeding sites were inspected, of which 760 contained immature stages of Ae. aegypti (‘positive’ containers). The most frequent container breeding sites found in each health district were tyres and both medium (buckets/cans/pots) and large (bins/barrels/drums) containers; these containers were also the most productive larval habitats and the types that most frequently tested positive. Of the Stegomyia indices, the Breteau, House and Container indices exceeded WHO dengue risk thresholds. Generalised linear mixed models showed that larval and pupal abundances were associated with container type, physicochemical characteristics of the water and collection month, but there were significant differences among container types and among health districts. Aedes aegypti body size was positively associated with type and diameter of the container, as well as with electrical conductivity of the water, and negatively associated with pH and temperature of the water and with the level of exposure of the container to sunlight. Conclusion This study provides data on putative determinants of the productivity of habitats regarding Ae. aegypti immature stages. These data are useful to better understand Ae. aegypti proliferation. The results suggest that identifying and targeting the most productive container breeding sites could contribute to dengue vector control strategies in Burkina Faso. Graphical Abstract

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Section: Introductionmentioning

confidence: 99%

Impact of physicochemical parameters of Aedes aegypti breeding habitats on mosquito productivity and the size of emerged adult mosquitoes in Ouagadougou City, Burkina Faso

et al. 2022

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“…Aedes aegypti is known to be the vector of several arboviruses of major public health importance, including Dengue virus (DENV), Yellow fever virus (YFV), chikungunya virus (CHIKV), Zika virus (ZKV) (Table IV) [50][51][52][53]. The circulation of YFV, DENV and ZKV has been observed in Burkina Faso [37,54,55]. Despite the existence of anti-amaril vaccine, an epidemic of yellow fever occurred in the South-east of Burkina Faso in 1983.…”

Section: Discussionmentioning

confidence: 99%

“…These observations con rm that the southern part of the savanna zone of West Africa is the setting for habitual circulation of YFV and therefore belongs to the endemic emergence zone. Since, yellow fever cases still occur in the country, despite the introduction of anti-amaril vaccine in the routine Expanded Program of Immunization Since 2013, several dengue outbreak were occurred in main city, Ouagadougou and Bobo-Dioulasso of the country [54,64]. The threat of YFV and DENV, as well as other viruses transmitted by Aedes and present in the region, such as the Zika virus [55], could be increased by the settlement of Ae.…”

Section: Discussionmentioning

confidence: 99%

Mosquito (Diptera: Culicidae) communities in contrasting areas from the Western regions of Burkina Faso: species diversity, abundance and implication in pathogen transmission

Kaboré

Soma

Gil

et al. 2023

Preprint

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Background: Mosquitoes (Diptera : Culicidae) are the arthropods that have the greatest negative impact on human health. The transformation of natural environments changing into urban and agricultural areas and population growing are phenomena that affect mosquito communities, thus influencing the risk of emerging or re-emerging vector-borne diseases. Here, we describe the diversity and abundance of adult mosquitoes in four environments with different anthropization levels (rural, urban, rice fields and forest) in a West African savannah zone. Methods: Mosquitoes were collected from two region (Hauts-Bassins and Sud-Ouest) of Burkina Faso during five periods between August 2019 and June 2021. Sampling sites were grouped according to anthropized environments. Mosquitoes were collected using BG sentinel traps and Prokopack aspirator. Analyses were performed using R software version 4.1.2. Logistic regression by generalized mixed linear models were used to test the effect of environment on mosquito abundance and diversity. Alpha diversity analysis was also performed using Vegan package. Results: A total of 10,625 adult mosquitoes were collected, belonging to 33 species, 5 genera: Culex, Aedes, Anopheles, Mansonia, and Ficalbia. The most dominant species were Cx. quinquefasciatus, An. gambiae s.l. and Ae. aegypti. Alpha diversity was similar across the regions. Habitat had a significant effect on mosquito species richness, Shannon index and Simpson index. The rural environment had the highest species richness (n = 28) followed by the forest environment (n= 24). The highest number (4,977/10,625) of mosquitoes was collected in urban environment. Conclusions: The composition of mosquito communities depended on the type of environment, with fewer species in highly anthropized environments such as urban and rice fields areas. Diversity and abundance of mosquito vectors could expose human populations from each environment to a potential risk of mosquito-borne diseases.

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“…The worldwide emergence of arboviruses including dengue, represents a major public health concern on the African continent where 34 countries are considered endemic for dengue [3]. Successive dengue outbreaks have been recorded since 2013 in the city of Ouagadougou [4][5][6][7] with the outbreaks of 2016-2017 being the most important to date [8,9]. Aedes aegypti is highly anthropophilic [10,11], well adapted to human environments and breeds in diverse arti cial and domestic containers [12,13].…”

Section: Introductionmentioning

confidence: 99%

Impact of Aedes aegypti breeding containers physicochemical parameters on their productivity and adult mosquito body size in Ouagadougou city, Burkina Faso

Ouédraogo

Toé

Sombié

et al. 2022

Preprint

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Background Outbreaks of dengue fever caused by viruses transmitted by Aedes aegypti mosquitoes are repeatedly reported in West Africa. Burkina Faso has experienced major dengue outbreaks most notably in 2016 and 2017, with 80% of cases recorded in Ouagadougou (Central health region). In order to better understand the ecology of this vector to provide information for control, a study on the productivity of Aedes breeding sites measured by abundance of immature stages, and resultant adult body size, and breeding site characteristics was undertaken in three Health Districts (Baskuy, Bogodogo, and Nongremassom) of the city of Ouagadougou. Methods Adult mosquitoes were collected indoors and outdoors in 643 households during the rainy season from -month- to -month- 2018. Water containers were systematically recorded and prospected for larval presence or absence. Breeding container characteristics including size, temperature, pH and conductivity were recorded as well as water volume. Traditional Stegomyia indices were calculated; generalised mixed models were fitted to larval and pupal densities, and the contribution of each covariate to the model evaluated by the Z-value and associated P-value. Results A total of 1,061 breeding sites were inspected, of which 760 were positive for Aedes aegypti immature stages. Tires, medium (Buckets/Cans/Pots) and large (Bin/barrel/drums) containers were the most frequent, positive and productive larval habitats in each health district. Of the Stegomyia indices, the Breteau, house and container indices exceeded WHO dengue risk thresholds. Generalised Linear Mixed Models (GLMMs) showed that larval and pupal abundances were each associated with container type, physicochemical characteristics and collection month, but with significant differences among container types among health districts. Aedes aegypti body size was positively associated with containers type, diameter, electrical conductivity; and negatively associated with pH, temperature, and a containers’ level of exposure to sunshine. Conclusion We provide data on putative determinants of Aedes aegypti immature habitat productivity, which are useful to better understand Aedes aegypti proliferation. The results suggest that targeting the most productive containers could contribute to dengue vector control strategies in Burkina Faso.

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Spatiotemporal analysis of dengue fever in Burkina Faso from 2016 to 2019

Cited by 14 publications

References 22 publications

Impact of physicochemical parameters of Aedes aegypti breeding habitats on mosquito productivity and the size of emerged adult mosquitoes in Ouagadougou City, Burkina Faso

Impact of physicochemical parameters of Aedes aegypti breeding habitats on mosquito productivity and the size of emerged adult mosquitoes in Ouagadougou City, Burkina Faso

Mosquito (Diptera: Culicidae) communities in contrasting areas from the Western regions of Burkina Faso: species diversity, abundance and implication in pathogen transmission

Impact of Aedes aegypti breeding containers physicochemical parameters on their productivity and adult mosquito body size in Ouagadougou city, Burkina Faso

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