Publications by authors named "Davy Jiolle"

and are the two most widespread and important species of mosquito-borne nematodes, posing a significant threat to veterinary health and particularly affecting canines and felines. While causes cardiopulmonary dirofilariasis, causes subcutaneous infections in dogs and other carnivores. Despite the extensive knowledge on these parasites, little is known about their natural vectors in Serbia.

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African populations of the mosquito Aedes aegypti are usually considered less susceptible to infection by human-pathogenic flaviviruses than globally invasive populations found outside Africa. Although this contrast has been well documented for Zika virus (ZIKV), it is unclear to what extent it is true for dengue virus (DENV), the most prevalent flavivirus of humans. Addressing this question is complicated by substantial genetic diversity among DENV strains, most notably in the form of four genetic types (DENV1 to DENV4), that can lead to genetically specific interactions with mosquito populations.

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African populations of the mosquito are usually considered less susceptible to infection by human-pathogenic flaviviruses than globally invasive populations found outside Africa. Although this contrast has been well documented for Zika virus (ZIKV), it is unclear to what extent it is true for dengue virus (DENV), the most prevalent flavivirus of humans. Addressing this question is complicated by substantial genetic diversity among DENV strains, most notably in the form of four genetic types (DENV1 to DENV4), that can lead to genetically specific interactions with mosquito populations.

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Article Synopsis
  • - The invasive mosquito Aedes albopictus, first noted in Central Africa during the 2000s, is causing outbreaks of diseases like dengue and chikungunya by spreading into wildlife areas and interacting with local animals.
  • - The study conducted from 2014 to 2018 monitored the mosquito's colonization in La Lopé National Park, using various trapping methods along areas influenced by human activity.
  • - Findings revealed Ae. albopictus was more prevalent near human-altered environments and that its populations decreased further into the forest, highlighting its potential role in spreading zoonotic diseases between wildlife and human communities.
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Mosquito surveillance programmes are essential to assess the risks of local vector-borne disease outbreaks as well as for early detection of mosquito invasion events. Surveys are usually performed with traditional sampling tools (i.e.

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First identified in 1947, Zika virus took roughly 70 years to cause a pandemic unusually associated with virus-induced brain damage in newborns. Zika virus is transmitted by mosquitoes, mainly Aedes aegypti, and secondarily, Aedes albopictus, both colonizing a large strip encompassing tropical and temperate regions. As part of the international project ZIKAlliance initiated in 2016, 50 mosquito populations from six species collected in 12 countries were experimentally infected with different Zika viruses.

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  • Many diseases that can make people or animals sick start in wild animals, so scientists need to keep an eye on these animals and their germs.
  • Catching samples from wild animals can be hard, but there's a cool method called xenosurveillance that uses blood-sucking bugs, like tsetse flies, to help collect these samples.
  • In a study in Tanzania, scientists found that tsetse flies had fed on different animals and discovered germs, including some that can be harmful, showing that this method can help us learn more about diseases in wild animals.
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  • The factors behind the rise of zoonotic viruses in humans, especially those transmitted by mosquitoes, are still not well understood.
  • A specific mosquito species, originally from Africa, has adapted to bite humans and breed in places like water storage, spreading globally over the last 400 years.
  • Research indicates that this mosquito's evolution and spread have not only increased encounters with humans but also made it more capable of acquiring and transmitting the Zika virus.
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Background: Mosquitoes are the deadliest animals in the world. Their ability to carry and spread diseases to humans causes millions of deaths every year. Due to the lack of efficient vaccines, the control of mosquito-borne diseases primarily relies on the management of the vector.

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Although specific interactions between host and pathogen genotypes have been well documented in invertebrates, the identification of host genes involved in discriminating pathogen genotypes remains a challenge. In the mosquito Aedes aegypti, the main dengue virus (DENV) vector worldwide, statistical associations between host genetic markers and DENV types or strains were previously detected, but the host genes underlying this genetic specificity have not been identified. In particular, it is unknown whether DENV type- or strain-specific resistance relies on allelic variants of the same genes or on distinct gene sets.

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  • The Zika virus started spreading in Yap Island in 2007 and has reached almost everywhere except Europe.
  • European mosquitoes have been tested and found to be less likely to catch the Zika virus from Asia compared to the version from Africa.
  • Only a small number of Montpellier mosquitoes can carry and spread Zika, making it unlikely for the virus to start spreading locally in Europe.
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Mosquitoes are vectors of arboviruses affecting animal and human health. Arboviruses circulate primarily within an enzootic cycle and recurrent spillovers contribute to the emergence of human-adapted viruses able to initiate an urban cycle involving anthropophilic mosquitoes. The increasing volume of travel and trade offers multiple opportunities for arbovirus introduction in new regions.

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  • * A study conducted in 2016 and expanded in 2017 investigated the species’ colonization and dispersal in various forested biomes, revealing that these mosquitoes were present in all studied locations and extended into the forest, but in decreasing numbers as they moved away from the edge.
  • * The research showed that female Aedes albopictus primarily feed on humans and domestic animals rather than wildlife, indicating a concern for their role in transmitting zoonotic diseases at the interface between urban and forested areas.
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  • The study investigates how the time it takes for mosquitoes to spread dengue virus influences the epidemiology of the disease.
  • It highlights that the genetic variation among different strains of the dengue virus significantly affects the rate at which mosquitoes become infectious after acquiring the virus.
  • The research uses simulations to predict that these differences in virus transmission dynamics could lead to varying risks of dengue outbreaks and the number of human infections.
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Background: Host-associated microbes, collectively known as the microbiota, play an important role in the biology of multicellular organisms. In mosquito vectors of human pathogens, the gut bacterial microbiota influences vectorial capacity and has become the subject of intense study. In laboratory studies of vector biology, genetic effects are often inferred from differences between geographically and genetically diverse colonies of mosquitoes that are reared in the same insectary.

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Conditions experienced during larval development of holometabolous insects can affect adult traits, but whether differences in the bacterial communities of larval development sites contribute to variation in the ability of insect vectors to transmit human pathogens is unknown. We addressed this question in the mosquito , a major arbovirus vector breeding in both sylvatic and domestic habitats in Sub-Saharan Africa. Targeted metagenomics revealed differing bacterial communities in the water of natural breeding sites in Gabon.

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Caves house pathogenic microorganisms, some of which are transmitted by blood-sucking arthropods. In Africa, previous studies identified mosquitoes, sand flies and biting midges as the main potential vectors of cave-dwelling pathogens. However, to understand their involvement in pathogen spillover, it is crucial to characterize their diversity, community composition and dynamics.

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  • Scientists studied how dengue virus spreads through mosquitoes and found that mosquitoes release virus parts in their waste after getting infected.
  • They discovered that by checking this waste, they can tell how much virus is in the mosquito's body over time, which helps understand how the virus spreads.
  • This method could be really helpful for tracking and preventing dengue outbreaks in real life by measuring how quickly the virus moves inside mosquitoes.
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Viruses rely on widespread genetic variation and large population size for adaptation. Large DNA virus populations are thought to harbor little variation though natural populations may be polymorphic. To measure the genetic variation present in a dsDNA virus population, we deep sequenced a natural strain of the baculovirus Autographa californica multiple nucleopolyhedrovirus.

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The genus Anopheles includes mosquito vectors of human malaria and arboviruses. In sub-Saharan Africa, the anopheline fauna is rich of nearly 150 species, few of which are anthropophilic and capable of transmitting pathogens to humans. Some of the remaining species are found in forests far from human environments and are vectors of wildlife pathogens.

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Background: Chikungunya and dengue viruses emerged in Gabon in 2007, with large outbreaks primarily affecting the capital Libreville and several northern towns. Both viruses subsequently spread to the south-east of the country, with new outbreaks occurring in 2010. The mosquito species Aedes albopictus, that was known as a secondary vector for both viruses, recently invaded the country and was the primary vector involved in the Gabonese outbreaks.

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