Causes

The virus of dengue fever belongs to the family flaviviridae. It is the RNA virus. Other member of the Flaviridae virus is the virus of yellow fever, virus of West Nile, virus of encephalitis of St. Louis, virus of Japanese encephalitis, virus of encephalitis of...

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Effects

The children who are below the age of 10 years get affected on the functioning of circulatory system during the dengue fever. The mortality rate lies in between the 6 to 30% and it is found that most of the death occurred in the patients of dengue...

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Treatment

It is found that at present there is no specific vaccine is found which can kill the virus of dengue fever not even a single anti virus tablets.
Dengue fever is treated by a medicine which is known as Paracetamol, an anti pyretics...

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Dengue Virus Life Cycle

As holometabolous insect it is also denoted with Aedes aegypti hence this insect completes a cycle of thorough transformation starting from an egg to larvae to pupae and finally stage of adulthood. Environmental conditions matter the most for the adult life span which usually ranges from even two weeks to thirty days and so on. Usually one-and-a-half to three week time frame is considered the Aedes aegypti lifecycle.

Egg

According to researches, once female Aedes aegypti mosquito takes a blood meal it starts producing 100 to 200 eggs on average batch levels. Female mosquitos therefore have the capacity to produce at least five eggs batches in their lifetimes. The blood meal size matters the most for proportionate number of eggs they produce. Dump surfaces are the major areas at which eggs are laid. Some of the commonest such areas are temporarily flooded places including the tree holes to containers like barrels, drums, jars, pots, buckets, flower vases and plant saucers besides tanks to discarded bottles amongst others. Some tins or even water cooler and all those places that can easily store the rain water collects remain the most susceptible places for the eggs. Unlike other species, female Aedes aegypti lays eggs separate. Depending on the suitable substrates they lay the eggs in many phases instead of in one go and also in the time frame of various hours or days as suitable. Usually the eggs are laid on certain places at specific distance above water lines in a planned manner. Typically such female mosquito hardly laid whole clutch at one site. It spreads out eggs on multiple sites instead.

Smoother eggs of Aedes aegypti are in the ovoid but longer shapes. Their lengths are not more than even one millimeter. The moment laid such eggs look whitish colored but sooner color changes to shiny black in mere few minutes. It might take mere two days for the eggs to develop in the warm climatic conditions while the duration might go to up to one week if the climate is comparatively one with cool temperature levels. It is also worth noting that laid eggs has easy survival for longer time which might be even more than one year if it is in the dry condition. Interestingly, the moment they are submerged into water they hatch instantly. That is why dengue virus mosquito control becomes so much tough in such scenario.

Larvae

Once eggs are hatched the next step is of larvae in the feeding of organic particulate matter in water that includes algae and numerous microscopic organisms as part of its lifecycle. Water’s surface is the one where maximum larval stage continues but once disturbed due to any reason they begin to swim to the container bottom during feeding time. The abundance of Larvae in areas such as places nearby home in puddles to tires and or anything that holds water are commonest. Its development solely depends on the temperature level. They have four instars through which larvae passes include short time spending in first three subsequent stages in mere three days for entry into 4th thereafter. By 4th instar larvae already turns nearly eight millimeters in length. Males pupate early because they start developing faster than their female counterparts. In case temperatures is in cooler condition there are chances of Aedes aegypti remain in larval stage for longer period of even months until get the sufficient water supply.

Pupae

Entry into the pupal stage is at the fourth instar period when mosquito pupae already turns mobile and therefore begins to respond the stimuli from then. First two days of time frame Pupae hardly develop and remain silent. The sooner it spreads and adults emerge once air ingests for expansion when abdomen splits open and pupal case literally emerges with first head in due course.