Sunday, 12 July 2015

DENGUE

Dengue has emerged since in 1950s as worldwide problem by first recognition of dengue hemorrhagic fever during endemic in Thailand and Philippine. Dengue effect as many as 400 million people are infected each year, more then one-third of world's population living in dengue risk affected areas. An estimate tells 500,000 people with sever dengue require hospitalization  each year large proportion of whom are children  and 2.5% of effected dies. Real culprit is dengue virus carried by mosquitoes; which is leading cause of death in tropics and subtropics rarely occur in United states but endemic in Rico ,Puerto, Latin America, Southeast Asia and Pacific island.
 
SEROTYPES
Four closely related to each other is DEN-1, DEN-2, DEN-3 ,DEN-4 .Recovery from each serotype provide lifelong immunity against that particular serotype.





TRANSMISSION
Aedes aegypti female mosquito is a primary vector for dengue. Lives in urban and breed in container made by humans it is a daytime feeder contrast to others p;peak biting period is early morning and in evening before dusk. Infected female transmit the virus and able to transmit to whole life its incubation period is 4-10 days.





CHARACTERISTICS
High fever of  104 degree Fahrenheit accompanied by 2 of symptoms include: muscle and joint pain, pain behind the eye, sever headache, nausea, vomiting ,rash. Symptoms last for 2-7 days. Flu like illness affect infants, child's and adults but it seldom cause death.




PREVENTION
Prevention is better then treatment so preventing mosquitoes egg lying habitats by some modification .As cleaning of domestic container of water on weekly basis and put proper insecticides in outer containers, proper disposal of waste, wearing long-sleeved clothes, household protection through screen windows ,coils ,sprays, active monitoring and surveillance of vector is required.




TREATMENT
yet not any vaccine to prevent infection with dengue virus so only most effective protective measures are those that avoid the mosquito bite. If infected then early recognition and prompt supportive treatment is substantially lower risk of any medical complication related to it and death.

NUTSHELL
Dengue is mosquito borne viral infection,found in tropical and sub-tropical climates worldwide, cause flu-like illness serious illness and death among children, incidence of dengue potentially grown over recent decades, half of population is at risk, no specific treatment control of dengue is to control of vector.