Dataset Information

Origin of a High-Latitude Population of Aedes aegypti in Washington, DC.

ABSTRACT: An overwintering population of Aedes aegypti has been documented in the Capitol Hill neighborhood of Washington, DC, since 2011. Mitochondrial cytochrome oxidase I (mtCOI) sequence data presented in a previous study traced the origin to the New World. Here, we use microsatellite and 14,071 single nucleotide polymorphisms along with mitochondrial DNA (mtDNA) sequences on Washington Ae. aegypti samples and samples from potential sources to further narrow the origin of this population. Genetically, Washington Ae. aegypti are closest to populations in Florida, meaning this is the most likely source. Florida experienced the first mosquito-borne transmission of dengue in the United States after decades of absence of this disease, as well as local transmission of chikungunya and Zika in recent years. This suggests that the Capitol Hill, Washington, DC population of Ae. aegypti is capable of transmitting viruses such as dengue, chikungunya, and Zika in modern US city environments.

SUBMITTER: Gloria-Soria A

PROVIDER: S-EPMC5929211 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature

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Origin of a High-Latitude Population of Aedes aegypti in Washington, DC.

Gloria-Soria Andrea A Lima Andrew A Lovin Diane D DD Cunningham Joanne M JM Severson David W DW Powell Jeffrey R JR

The American journal of tropical medicine and hygiene 20171214 2

An overwintering population of Aedes aegypti has been documented in the Capitol Hill neighborhood of Washington, DC, since 2011. Mitochondrial cytochrome oxidase I (mtCOI) sequence data presented in a previous study traced the origin to the New World. Here, we use microsatellite and 14,071 single nucleotide polymorphisms along with mitochondrial DNA (mtDNA) sequences on Washington Ae. aegypti samples and samples from potential sources to further narrow the origin of this pop ...[more]

PMID: 29260658

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Project description:BackgroundThe global incidences of dengue virus have increased the interest in studying and understanding the mosquito population dynamics. It is predominantly spread by Aedes aegypti in the tropical and sub-tropical countries in the world. Understanding these dynamics is important for public health in countries where climatic and environmental conditions are favorable for the propagation of these diseases. For this reason, a new model has been proposed to investigate the population dynamics of mosquitoes in a city.MethodsThe present paper discusses the numerical modeling of population dynamics of Ae. aegypti mosquitoes in an urban neighborhood of a city using the finite volume method. The model describes how populations spread through the city assisted by the wind. This model allows incorporating external factors (wind and chemical insecticides) and topography data (streets, building blocks, parks, forests and beach). The proposed model has been successfully tested in examples involving two Brazilian cities (City center, Juiz de Fora and Copacabana Beach, Rio de Janeiro).ResultsInvasion phenomena of Ae. aegypti mosquitoes have been observed in each of the simulations. It was observed that, inside the blocks, the growth of the population for both winged and aquatic phase causes an infestation of Ae. aegypti in a short time. Within the blocks the mosquito population was concentrated and diffused slowly. In the streets, there was a long-distance spread, which was influenced by wind and diffusion with a low concentration of mosquito population. The model was also tested taking into account chemical insecticides spread in two different configurations. It has been observed that the insecticides have a significant effect on the mosquito population for both winged and aquatic phases when the chemical insecticides spread more uniformly along all the streets in a neighborhood of a city.ConclusionsThe presented methodology can be employed to evaluate and to understand the epidemic risks in a specific region of the city. Moreover the model allows an increase in efficiency of the existing mosquito population control techniques and to theoretically test new methods before involving the human population.

Dataset Information

Origin of a High-Latitude Population of Aedes aegypti in Washington, DC.

Publications

Origin of a High-Latitude Population of <i>Aedes aegypti</i> in Washington, DC.

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