Dengue Hemorrhagic Fever is an infectious disease caused by the house mosquito biting children who are sick with Dengue fever, and transmit to other children. Most infected children are younger than 15 years. Disease epidemic is in rainy season, May to September. Each year, there is a great number of patient with Dengue Hemorrhagic Fever.

         House mosquito likes to work for a living day and hide in the community. It prefer to spawn in the calm water, such as big earthen jars, bowls in toilet, flowerpot dishes, old tyres, can, coconut shells etc.

         Causes

         Dengue Hemorrhagic Fever is an infectious disease caused by the common house mosquito (Aedes aegyti) female flight to bite people who are sick with Dengue fever, especially during high fever. Viral Dengue will add approximately 8-10 days in the mosquito, the virus will go to the stomach and salivary gland. When mosquitoes bite people will transmit the virus to humans. Disease is approximately 2-7 days in the body during a fever. If such people are bitten during this time, the virus will be transmitted to other people, most are children. This kind of disease is epidemic in rainy season. The mosquito likes to work for a living day by the homes and schools. It prefers to spawn in the calm water containers such as old tyre, coconut shells, can, cabinet bowls, but not in the sewage pipe and natural water resources.

         When to Know the Dengue Hemorrhagic Fever?

         The symptoms of Dengue Hemorrhagic Fever are not specific; it varies from only fever and urticaria, until high fever, headache, body pain, eye pain, muscle pain. If the disease is not concerned, late treatment may bereave the patients. The significant symptoms are:

• Suddenly high fever for 2-7 days.
• Bored with food, blush, headache, as well as feeling queasy and vomiting, and stomach ache.
• Bleeding spot along body, arm and leg, nosebleed, teeth bleed, black stools since bleeding, and may be shocked.
• In case of shocked, fever will reduce but the patient will be drowsy, cold, unconscious, and dead.

         Symptoms

         No obvious symptoms, or a bit, or so serious that dead. After recovered, there will be such immunity forever. The severity depends on age of patients, immunity condition, and the violence of virus. There are 3 types of symptom:

• Dengue Fever infection.
• Dengue Hemorrhagic Fever (DHF)
• Dengue Shock Syndrome (DSS)

         Treatment

        There is no specific treatment for Dengue Hemorrhagic Fever. The close conservation to prevent being shocked and bleeding, and enough water feeding can reduce death rate for 1 percent.

         Vaccine

        Vaccine production is in progress, but there is difficulty because of 4 breeds. However, it is supposed to succeed soon.

         Prevention and Control

The best way to prevent and control is restriction of mosquito spreading.
• Restrict mosquito breeding source such as coconut shell, tyre, and can.
• Use lidded container such as big earthen jar and tab.
• Grow fish or fill chemicals to eradicate mosquito larva.