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- Aedes aegypti bites primarily during the day. This species is most active for approximately two hours after sunrise and several hours before sunset, but it can bite at night in well lit areas.
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Jun 21, 2022 · Larvae live in the water. They hatch from mosquito eggs. This happens when water (from rain or a sprinkler) covers the eggs. Larvae can be seen in the water. They are very active and are often called “wigglers.”
Larvae live in the water. They hatch from mosquito eggs. This happens when water (from rain or a sprinkler) covers the eggs. Larvae can be seen in the water. They are very active and are often called “wigglers.” Pupa. • Pupae live in the water. An adult mosquito emerges from the pupa and flies away. Adult female mosquitoes bite people and animals.
- Overview
- Physical features
- Life cycle and behaviour
- Role in disease transmission
Aedes, genus of more than 950 species of mosquitoes (order Diptera), some members of which are serious biting nuisances and vectors of disease, sometimes transmitting potentially deadly pathogens (disease-causing organisms) to humans and other animals. The different species of Aedes mosquitoes are native to temperate and tropical habitats worldwide...
Adult Aedes mosquitoes are distinguished from other types of mosquitoes by their narrow and typically black body, unique patterns of light and dark scales on the abdomen and thorax, and alternating light and dark bands on the legs. Females are further distinguished by the shape of the abdomen, which usually comes to a point at its tip, and by their maxillary palps (sensory structures associated with the mouthparts), which are shorter than the proboscis. Aedes mosquitoes characteristically hold their bodies low and parallel to the ground with the proboscis angled downward when landed.
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The life cycle of Aedes mosquitoes consists of four stages (egg, larva, pupa, and adult), with adults emerging anywhere from seven days to several weeks after egg hatching. Females deposit black-colored eggs singly on a moist surface (e.g., mud) close to the waterline in locations that experience flooding, such as marshes, tree holes, or plant axils (point of connection between the leaf and stem). Human-made objects, such as clay pots, plastic containers, and tires, are common egg-laying sites. Following immersion in water, eggs hatch in batches, a process that may last days or weeks, since some eggs require multiple soakings in water before hatching. Eggs can endure long periods of desiccation (drying) and maintain viability for many months, enabling them to survive cold winters and other adverse climatic conditions.
Aedes larvae live in water, typically hanging upside down at an angle from the water surface, where they use a short thick respiratory siphon to take up oxygen from the air above the water. Larvae mature through four instars (stages), in the last stage developing into pupae, which subsequently change into adults that emerge at the water’s surface. Within two days of emerging, adult Aedes mosquitoes mate, and females subsequently consume their first blood meal.
Multiple Aedes species play a role in the transmission of disease to humans, and in many instances any of several different species can transmit the same pathogen. For example, although A. aegypti is the principal vector of dengue viruses in Africa and the Americas, A. albopictus can also transmit the disease to humans in those regions. In French Polynesia, A. polynesiensis serves as an endemic dengue vector. Dengue outbreaks have also been attributed to A. scutellaris, a species native to islands of the Malay Archipelago, Papua New Guinea, and the Torres Strait region.
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The spread of Aedes mosquitoes, especially A. aegypti and A. albopictus, which are native to Africa and Asia, is suspected of facilitating the uptake and transmission of pathogens by endemic Aedes species. Infected humans may also play a role. For example, A. polynesiensis is a suspected vector of Zika virus in French Polynesia (A. aegypti is the main vector). The virus was first detected on the island country in 2013, likely having been imported by an infected human or by infected mosquito larvae.
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Characteristics. Aedes mosquitoes are visually distinctive because they have noticeable black and white markings on their bodies and legs. Unlike most other mosquitoes, they are active and bite only during the daytime. The peak biting periods are early in the morning and in the evening before dusk. [8] [9] Direct children of this genus.
Jan 2, 2023 · Common name: Yellow fever mosquito. Synonyms and other name in use: Stegomyia aegypti. Aedes aegypti is a known vector of several viruses including yellow fever virus, dengue virus, chikungunya virus, and Zika virus.
