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Dengue Fever and Environmental Factors

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Dengue Fever and Environmental Factors
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The morphology and life cycle

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The morphology and life cycle

6813727-24819
Dengue

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Dengue

346405627174
Symptoms of Dengue

Symptoms of Dengue

1140811408What is dengue?
Dengue is a viral infection transmitted by the bite of an infected female Aedes mosquito.
Estimated 100 million cases of dengue fever occurring throughout the world annually.

Virulence factors
Dengue fever (Fever Dengue)
Dengue haemorrhagic fever ((Fever Hemorrhagic
The virus that causes dengue fever has four different serotypes DEN-1, DEN-2, DEN-3, and DEN-4. These serotypes have the same genome and morphology but different antigens.
Morphology and life cycle
RNA viruses belong to family Flaviviridae these mosquitoes undergo complete metamorphosis meaning they go through four stages (egg, larva, pupa, adult). During the summer, mosquitoes typically go from egg to adult in 7-10 days but this will vary depending on temperature, humidity, and other environmental factors. Males tend to live a very short time, usually about one week; and females live about one month again depending on environmental factors.
How long symptoms appear?
Symptoms appear in 3–14 days (average 4–7 days) after the infective bite. Dengue fever is a flu-like illness that affects infants, young children and adults.
How dengue virus is transmitted to humans?
Dengue virus is not transmitted directly from one person to another, but is transmitted through infected mosquitoes. Female mosquitoes bite Aedes people were injured and then become infectious throughout their life span ranging from 15 to 60 days. Female mosquitoes lay eggs Aedes in freshwater and stagnant. Going through the stages of growth of the eggs take approximately 10 days and then graduated adult gnats.
Signs and symptoms of disease
Fever Joint aches
Headache Swollen lymph nodes
Muscle aches Vomiting weakness, discomfort Rash
Stages of Dengue:There are four different stages of dengue fever that
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