Mardoché Azongnibo - Academia.edu (original) (raw)

Papers by Mardoché Azongnibo

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

Medical and Veterinary Entomology

Dengue and yellow fever are prevalent in Côte d'Ivoire and Aedes (Stegomyia) aegypti (Linnaeu... more Dengue and yellow fever are prevalent in Côte d'Ivoire and Aedes (Stegomyia) aegypti (Linnaeus), (Diptera: Culicidae), is known as the main vector. We aimed to assess seasonal variation and spatial heterogeneity in the transmission of both arbovirus diseases in Abidjan. Entomological surveys targeting larvae of A. aegypti, were carried out between November 2015 and August 2016 covering the four climatic seasons including a cohort of 100 houses randomly selected in three neighbourhoods. A. aegypti was the predominant species (96.6%) of mosquitoes resulting from the rearing of harvested larvae, and the only vector of dengue and yellow fever recorded during the study period. The highest proportion of water storage containers (45.5%) which represented the major breeding sites infested by the larvae of A. aegypti, was observed in Anoumabo. The house indices >5% and/or Breteau indices >20 recorded in each neighbourhood, during the different climatic seasons, indicated that there...

Research paper thumbnail of High density in dry season and resistance to pyrethroids of Aedes aegypti populations in Bouaké, Côte d’Ivoire

International Journal of Tropical Insect Science

Research paper thumbnail of Spatial Heterogeneity and Seasonal Distribution of Aedes (Stegomyia) aegypti (L) in Abidjan, Côte d'Ivoire

Vector-Borne and Zoonotic Diseases, 2021

Although the urban areas of Abidjan, Côte d'Ivoire have faced recurrent outbreaks of Aedes-borne ... more Although the urban areas of Abidjan, Côte d'Ivoire have faced recurrent outbreaks of Aedes-borne arboviruses, the seasonal dynamics of local populations of the key vector Aedes aegypti remained still underexplored for an effective vector control. The current study thus assessed the seasonal dynamics and the spatial distribution of Ae. aegypti in three neighborhoods of Abidjan city. Aedes eggs were collected using ovitraps in three different neighborhoods (Anoumambo, Bromakoté, and Petit-Bassam) during the four climatic seasons of Abidjan. Aedes egg samples were immersed into distilled water, and emerged larvae were reared until the adult stage for species morphological identification. Spatial autocorrelation was measured with the Moran's Index, and areas with high egg abundance were identified. In total, 3837 eggs were collected providing 1882 adult mosquitoes in the 3 neighborhoods. All the specimens belonged to only one Aedes species, Ae. aegypti. The average of 15.89 eggs per ovitrap, 13.67 eggs per ovitrap, and 19.87 eggs per ovitrap were obtained in Anoumambo, Bromakoté, and Petit-Bassam, respectively, with no statistical difference between the three sites. A higher abundance of Ae. aegypti was observed during the long rainy season and the short dry season. The Moran analysis showed a clustered distribution of Ae. aegypti eggs during the long rainy season in the three sites and a random spatial distribution during the short dry season. Ovitraps with high number of eggs were aggregated in the peripheral part (near to the lagoon) of Anoumambo and Petit-Bassam in central Bromakoté and extending along the railway during the long rainy season. This study revealed a heterogeneous potential risk of transmission of arbovirus according to neighborhood. It provided data to better understand Ae. aegypti ecology to select appropriate periods and places for Aedes vector control actions and surveillance of arboviruses in Abidjan.

Research paper thumbnail of Bionomy of Anopheles funestus and Anopheles gambiae, in two areas of high Long-lasting insecticidal Nets coverage in Côte d'Ivoire

The biodynamics of the main malaria vectors was studied in rural areas of Côte d'Ivoire, afte... more The biodynamics of the main malaria vectors was studied in rural areas of Côte d'Ivoire, after Long-Lasting Insecticidal Nets (LLINs) national coverage. Adult mosquitoes sample by Human Landing Catches (HLC) and Pyrethrum Spray Catches (PSC) have been identified morphologically and by molecular biology. Entomological parameters of malaria biology and transmission were calculated for each species. An. coluzzii, An. gambiae s.s. and An. funestus were the vector species identified in Toumbokro while An. coluzzii, An. funestus and An. nili were identified in Kassiapleu. These vectors feed preferentially on humans in the two villages. In Toumbokro An. gambiae s.l. is exophagic while An. funestus is endophagic. In this village, The annual entomological inoculation rate (EIR) average was high and estimated at 241 infected bites per person per year (ib/p/y) (80.81 ib/p/y for An. gambiae s.l. and 147.68 ib/p/y for An. funestus). An. funestus has become the principal vector and assured it...

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

Medical and Veterinary Entomology

Dengue and yellow fever are prevalent in Côte d'Ivoire and Aedes (Stegomyia) aegypti (Linnaeu... more Dengue and yellow fever are prevalent in Côte d'Ivoire and Aedes (Stegomyia) aegypti (Linnaeus), (Diptera: Culicidae), is known as the main vector. We aimed to assess seasonal variation and spatial heterogeneity in the transmission of both arbovirus diseases in Abidjan. Entomological surveys targeting larvae of A. aegypti, were carried out between November 2015 and August 2016 covering the four climatic seasons including a cohort of 100 houses randomly selected in three neighbourhoods. A. aegypti was the predominant species (96.6%) of mosquitoes resulting from the rearing of harvested larvae, and the only vector of dengue and yellow fever recorded during the study period. The highest proportion of water storage containers (45.5%) which represented the major breeding sites infested by the larvae of A. aegypti, was observed in Anoumabo. The house indices >5% and/or Breteau indices >20 recorded in each neighbourhood, during the different climatic seasons, indicated that there...

Research paper thumbnail of High density in dry season and resistance to pyrethroids of Aedes aegypti populations in Bouaké, Côte d’Ivoire

International Journal of Tropical Insect Science

Research paper thumbnail of Spatial Heterogeneity and Seasonal Distribution of Aedes (Stegomyia) aegypti (L) in Abidjan, Côte d'Ivoire

Vector-Borne and Zoonotic Diseases, 2021

Although the urban areas of Abidjan, Côte d'Ivoire have faced recurrent outbreaks of Aedes-borne ... more Although the urban areas of Abidjan, Côte d'Ivoire have faced recurrent outbreaks of Aedes-borne arboviruses, the seasonal dynamics of local populations of the key vector Aedes aegypti remained still underexplored for an effective vector control. The current study thus assessed the seasonal dynamics and the spatial distribution of Ae. aegypti in three neighborhoods of Abidjan city. Aedes eggs were collected using ovitraps in three different neighborhoods (Anoumambo, Bromakoté, and Petit-Bassam) during the four climatic seasons of Abidjan. Aedes egg samples were immersed into distilled water, and emerged larvae were reared until the adult stage for species morphological identification. Spatial autocorrelation was measured with the Moran's Index, and areas with high egg abundance were identified. In total, 3837 eggs were collected providing 1882 adult mosquitoes in the 3 neighborhoods. All the specimens belonged to only one Aedes species, Ae. aegypti. The average of 15.89 eggs per ovitrap, 13.67 eggs per ovitrap, and 19.87 eggs per ovitrap were obtained in Anoumambo, Bromakoté, and Petit-Bassam, respectively, with no statistical difference between the three sites. A higher abundance of Ae. aegypti was observed during the long rainy season and the short dry season. The Moran analysis showed a clustered distribution of Ae. aegypti eggs during the long rainy season in the three sites and a random spatial distribution during the short dry season. Ovitraps with high number of eggs were aggregated in the peripheral part (near to the lagoon) of Anoumambo and Petit-Bassam in central Bromakoté and extending along the railway during the long rainy season. This study revealed a heterogeneous potential risk of transmission of arbovirus according to neighborhood. It provided data to better understand Ae. aegypti ecology to select appropriate periods and places for Aedes vector control actions and surveillance of arboviruses in Abidjan.

Research paper thumbnail of Bionomy of Anopheles funestus and Anopheles gambiae, in two areas of high Long-lasting insecticidal Nets coverage in Côte d'Ivoire

The biodynamics of the main malaria vectors was studied in rural areas of Côte d'Ivoire, afte... more The biodynamics of the main malaria vectors was studied in rural areas of Côte d'Ivoire, after Long-Lasting Insecticidal Nets (LLINs) national coverage. Adult mosquitoes sample by Human Landing Catches (HLC) and Pyrethrum Spray Catches (PSC) have been identified morphologically and by molecular biology. Entomological parameters of malaria biology and transmission were calculated for each species. An. coluzzii, An. gambiae s.s. and An. funestus were the vector species identified in Toumbokro while An. coluzzii, An. funestus and An. nili were identified in Kassiapleu. These vectors feed preferentially on humans in the two villages. In Toumbokro An. gambiae s.l. is exophagic while An. funestus is endophagic. In this village, The annual entomological inoculation rate (EIR) average was high and estimated at 241 infected bites per person per year (ib/p/y) (80.81 ib/p/y for An. gambiae s.l. and 147.68 ib/p/y for An. funestus). An. funestus has become the principal vector and assured it...