Papers by Athanase Badolo
Viruses
Mosquito-associated viruses (MAVs), including mosquito-specific viruses (MSVs) and mosquito-borne... more Mosquito-associated viruses (MAVs), including mosquito-specific viruses (MSVs) and mosquito-borne (arbo)viruses (MBVs), are an increasing public, veterinary, and global health concern, and West Africa is projected to be the next front for arboviral diseases. As in-depth knowledge of the ecologies of both western African MAVs and related mosquitoes is still limited, we review available and comprehensive data on their diversity, abundance, and distribution. Data on MAVs’ occurrence and related mosquitoes were extracted from peer-reviewed publications. Data on MSVs, and mosquito and vertebrate host ranges are sparse. However, more data are available on MBVs (i.e., dengue, yellow fever, chikungunya, Zika, and Rift Valley fever viruses), detected in wild and domestic animals, and humans, with infections more concentrated in urban areas and areas affected by strong anthropogenic changes. Aedes aegypti, Culex quinquefasciatus, and Aedes albopictus are incriminated as key arbovirus vectors....
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Mosquitoes have developed resistance to various synthetic insecticides, making their control incr... more Mosquitoes have developed resistance to various synthetic insecticides, making their control increasingly difficult. As part of the search for natural biocides, an alternative to synthetic insecticides, larvicidal and oviposition-deterrence activities of ethanol, acetone and hexane extracts of Lantana camara L., Hyptis suaveolens Poit., Ocimum canum Sims. and Hyptis spicigera Lam. on sensitive and local strains of An. gambiae s. l. were evaluated. Larvicidal activity was assessed according to the WHO standard protocol. Oviposition deterrence activity was evaluated using gravid Anopheles gambiae s. l. Phytochemical screening of these plant extracts revealed the presence of terpenes, tannins, saponins, alkaloids, flavonoids, steroids and phenols. The LC50 and LC90 values determined for these extracts varied according to plants and solvents. The hexane extracts of L. camara were the most toxic to An. gambiae local strain larvae with LC50 value of 20.19 ppm (95% CL=14.35-26.67) and LC90 value of 49.29ppm (95% CL=37.13-65.40). Extracts also showed high oviposition-deterrence of An. gambiae. For L. camara acetone extract, The average number of eggs was 0 ± 0, 10 ± 1 and 128 ± 16 eggs in treated plastic cups while in control plastic cups it was 258 ± 36, 224 ± 55 and 256 ± 31 eggs at 100 ppm, 500 ppm, 1000 ppm respectively. Our results indicated that these extracts, mainly extracts of Lantana camara, could be used for An. gambiae control as ecofriendly natural products.
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International Journal of Tropical Insect Science
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BackgroundExisting mechanisms of insecticide resistance have been known to help the survival of m... more BackgroundExisting mechanisms of insecticide resistance have been known to help the survival of mosquitoes following contact with chemical compounds, even though they could negatively affect the life-history traits of resistant malaria vectors. In West Africa, the knock-down resistance mechanism, kdrR (L1014F) is the most common. However, little knowledge is available on its effects on mosquito life traits. We investigated the fitness effects associated with this knock-down resistance allele in Anopheles gambiae sensu stricto (s.s.).MethodsTwo laboratory reference strains of An. gambiae s.s., Kisumu (susceptible) and KisKdr (kdr resistant) were used. Female mosquitoes were fed and allowed to lay eggs. Fecundity and fertility were assessed by examining the number of eggs per mosquito and larval hatching rates. Larval survivorship and pupation rates were also measured. Female mosquitoes of both strains were fed through membrane feeding assays, then the blood feeding success, blood vol...
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International Journal of Tropical Insect Science
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Current Biology
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Asian Journal of Medicine and Health
The world is experiencing an outbreak due to the new and mysterious SARS-CoV-2. Information regar... more The world is experiencing an outbreak due to the new and mysterious SARS-CoV-2. Information regarding its source and transmission dynamics in different environments as well as medications for its prevention and cure is weak. This review seeks to document on the epidemiology, clinical signs, control, prevention, and present some perspectives for SARS-CoV-2 research in Africa. There are geographical differences in morbidity and mortality rates of this disease all over the world. The scientific community strongly reject claims regarding the fact that the virus has been genetically manipulated, but supports the theory that it has a natural origin from animal host as any other emerging viral disease. Although animals are thought to be the original source of global spill over, person-to-person transmission is well comprehended. Transmission could be enhanced by symptomatic and asymptomatic individuals with high contaminations reported in dense urban environments. Scientific evidences from...
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Parasitology International
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PROTEOMICS
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Infection, Genetics and Evolution
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Food Security
Edible insects have been advocated as a means to combat food insecurity, which is prevalent in We... more Edible insects have been advocated as a means to combat food insecurity, which is prevalent in West Africa. In this study we look at the contribution of the shea caterpillar Cirina butyrospermi, colloquially known as ‘chitoumou’, to the food security of smallholder households in rural southwestern Burkina Faso. We used a mixed methods approach to understand the relationship between caterpillar collection, consumption, and sale by smallholder households, and their seasonal food security status. We found that caterpillars are an important source of food and income for households, significantly increasing the household consumption of animal protein and, with shea nuts, representing the main income source for the majority of women. We also found that food security is higher during caterpillar season, and that household-level food security during this season can be predicted by the amount of caterpillars collected, consumed and sold. However, this relationship holds only during the cater...
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Journal of Economic Entomology
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Molecular Biology Reports
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Agroforestry Systems
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PLOS Neglected Tropical Diseases
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Malaria Journal
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Tropical Medicine and Health
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Antiviral Research
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Ecology and evolution, 2018
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International journal of environmental research and public health, Jan 28, 2018
The Zika crisis drew attention to the long-overlooked problem of arboviruses transmitted by Aedes... more The Zika crisis drew attention to the long-overlooked problem of arboviruses transmitted by Aedes mosquitoes in Africa. Yellow fever, dengue, chikungunya and Zika are poorly controlled in Africa and often go unrecognized. However, to combat these diseases, both in Africa and worldwide, it is crucial that this situation changes. Here, we review available data on the distribution of each disease in Africa, their Aedes vectors, transmission potential, and challenges and opportunities for Aedes control. Data on disease and vector ranges are sparse, and consequently maps of risk are uncertain. Issues such as genetic and ecological diversity, and opportunities for integration with malaria control, are primarily African; others such as ever-increasing urbanization, insecticide resistance and lack of evidence for most control-interventions reflect problems throughout the tropics. We identify key knowledge gaps and future research areas, and in particular, highlight the need to improve knowl...
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Papers by Athanase Badolo