Dr. Tridib GhoseChittagong, Bangladesh June 2008

Caused by: Any 1 of 4 closely related viruses:DEN-1, DEN-2, DEN-3, or DEN-4

Dengue Dengue Fever:Fever:Dengue : pronounced den' gee

These mosquitoes lives near human habitations where they breed in even the cleanest water.

Incubation period: fever comes within 8 days of mosquito bite.

If the infection is treated on time, Mortality rate get reduced

It is also known as Break Bone Fever.

Transmitter or vector of viruses: Aedes mosquito

Dengue hemorrhagic fever (DHF)?Dengue hemorrhagic fever (DHF)?

More severe form of dengue.

Can be fatal if unrecognized & not properly treated.

Each year over 100 million cases of Dengue worldwide

How dengue fever & DHF How dengue fever & DHF spread ?spread ?

Aedes mosquito becomes infected with dengue virus when it bites a person who has dengue or DHF

After about a week it can transmit the virus while biting a healthy person.

Dengue cannot be spread directly from person to person.

TRANSMISSION TRANSMISSION CYCLE:CYCLE:

Primarily in areas where Aedes mosquitoes live, which include most tropical urban areas of the world.

Dengue viruses may be introduced into areas by travelers who become infected while visiting other areas of the tropics where dengue commonly exists

Where can outbreaks of dengue occur?Where can outbreaks of dengue occur?

Risk factors of Dengue:Risk factors of Dengue:

Central and South America

Africa

The Caribbean

Southeast Asia including Bangladesh

The Middle East

The South & Central Pacific

If you live or travel in tropical areas:

When you at more risk?When you at more risk?

If you've had dengue fever before….

In case of dengue fever, having antibodies to Dengue in the blood from a previous infection actually increases your risk of severe disease — dengue hemorrhagic fever — if you're infected again. If you are ~

younger than age 12, female White

Symptoms:Symptoms:

symptoms of the disease?symptoms of the disease?Mild Dengue : Fever for 3-5 days Intense frontal headache Fatigue Muscle and join pains Vomiting Reduced with appetite

Dengue Hemorrhagic Fever: Bleeding from the nose Frequently vomiting blood or without

blood Excessive thirst Difficulty in breathing Fainting

What is the What is the treatmenttreatment for for dengue?dengue?

There is no specific medication for treatment of a dengue infection.

Persons who think they have dengue should use pain relievers & avoid aspirin.

Rest

Drink plenty of fluids

Consult a physician.

Is there an effective treatment for dengue Is there an effective treatment for dengue hemorrhagic fever (DHF)?hemorrhagic fever (DHF)?

As with dengue, there is As with dengue, there is no no specific medicationspecific medication for DHF. for DHF.

It can however be effectively It can however be effectively treated by treated by fluid replacementfluid replacement therapy if an early clinical therapy if an early clinical diagnosis is made. diagnosis is made.

There isThere is no vaccine no vaccine against against dengue fever.dengue fever.

Environmental Management &Environmental Management &Source Reduction Methods:Source Reduction Methods:

Detection & elimination of mosquito Detection & elimination of mosquito breeding sources like dbreeding sources like discarded tires,iscarded tires,Coconut shells , empty cans, Coconut shells , empty cans, Household & garden utensilsHousehold & garden utensils

Management of roof tops, porticos & Management of roof tops, porticos & sunshades sunshades

Proper covering of stored water Proper covering of stored water

Reliable water supply Reliable water supply Observation of weekly dry dayObservation of weekly dry day

1. Preventing breeding of mosquitoes and larvae&

2. preventing mosquito bites

Prevent breeding of mosquitoes & larvae:

ways to prevent Dengue:ways to prevent Dengue:

mosquitoes that spread malaria - bite at night (from "dusk until dawn"), mosquitoes that spread dengue fever - bite

during the day. While outdoors:

Wear light-colored clothing, long sleeves & long pants. Use insect repellent Reapply after swimming or excessive sweating.

While indoors or asleep:

Install fly-wire on windows Use "insect spray to kill mosquitoes Use bed net

worker sprays chemicals to kill mosquitoes to prevent spread of dengue fever.

Prevention of mosquito Prevention of mosquito bites:bites:

Prevention of Dengue:Prevention of Dengue:

HEALTH EDUCATION:

Impart knowledge to common people regarding the disease & vector

through various media sources like TV, Radio, Cinema slides, etc.

COMMUNITY PARTICIPATION:

Sensitizing and involving the community for detection of Aedes

breeding places & their elimination.