Life cycle of aedes aegypti


Aedes aegypti , the yellow fever mosquito , is a mosquito that can spread dengue fever , chikungunya , Zika fever , Mayaro and yellow fever viruses, and other diseases. The mosquito can be recognized by white markings on its legs and a marking in the form of a lyre on the upper surface of its thorax . This mosquito originated in Africa, [2] but is now found in tropical and subtropical regions throughout the world. [3]

Aedes aegypti is a vector for transmitting several tropical fevers. Only the female bites for blood, which she needs to mature her eggs. To find a host, these mosquitoes are attracted to chemical compounds emitted by mammals, including ammonia , carbon dioxide , lactic acid , and octenol . Scientists at the USDA Agricultural Research Service have studied the specific chemical structure of octenol to better understand why this chemical attracts the mosquito to its host. [4] They found the mosquito has a preference for "right-handed" ( dextrorotatory ) octenol molecules.

The Centers for Disease Control and Prevention traveler's page on preventing dengue fever suggests using mosquito repellents that contain DEET (N, N-diethylmetatoluamide, 20% to 30%). It also suggests:

In dengue virus infected mosquito's, the virus is present in the salivary glands of the mosquito. When a female Aedes aegypti bites a human for food, she injects saliva into the wound where the anti-coagulants contained in her saliva facilitate feeding. Without knowing, the mosquito also injects the dengue virus into the host. Since the virus can be passed from adult to egg, the dengue virus is guaranteed to survive until the next summer and heavy rains.

The mosquito Aedes aegypti comes in three polytypic forms: domestic, sylvan, and peridomestic.
- The domestic form breeds in urban habitat, often around or inside houses.
- The sylvan form is a more rural form, and breeds in tree holes, generally in forests.
- The peridomestic form thrives in environmentally modified areas such as coconut groves and farms.

Mosquitoes go through their complex life cycle quickly, typically maturing to adults in a week or two. Adults then live a few weeks to several months more, while they breed and lay eggs to start the next generation.

All mosquitoes begin their life cycle as eggs, laid either on or near water. The eggs are tiny, less than a millimeter long. They begin white, but darken to black, brown or reddish brown within the first day.

Once any kind of mosquito eggs hatch, they producing the next stage in the life cycle, the larva (plural "larvae"). They're commonly called wrigglers or wigglers, because they move in the water by wriggling. You can see them swimming or hanging close to the surface in rain barrels, flooded ditches, the edges of swamps or other stagnant water. They live in water but breath air, so like snorkelers, they have a breathing tube and must come close to the surface often to get oxygen. When resting, they usually hang down from the surface or, in some species, lie horizontally just below it.

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Aedes aegypti , the yellow fever mosquito , is a mosquito that can spread dengue fever , chikungunya , Zika fever , Mayaro and yellow fever viruses, and other diseases. The mosquito can be recognized by white markings on its legs and a marking in the form of a lyre on the upper surface of its thorax . This mosquito originated in Africa, [2] but is now found in tropical and subtropical regions throughout the world. [3]

Aedes aegypti is a vector for transmitting several tropical fevers. Only the female bites for blood, which she needs to mature her eggs. To find a host, these mosquitoes are attracted to chemical compounds emitted by mammals, including ammonia , carbon dioxide , lactic acid , and octenol . Scientists at the USDA Agricultural Research Service have studied the specific chemical structure of octenol to better understand why this chemical attracts the mosquito to its host. [4] They found the mosquito has a preference for "right-handed" ( dextrorotatory ) octenol molecules.

The Centers for Disease Control and Prevention traveler's page on preventing dengue fever suggests using mosquito repellents that contain DEET (N, N-diethylmetatoluamide, 20% to 30%). It also suggests:

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Life cycle of aedes aegypti
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