Specific Purpose : To inform my audience about the nature, symptoms, treatment and prevention of Dengue fever.
Central Idea : People now at risk from dengue and estimates that there may be 50 million cases of dengue infection worldwide every year. The disease is now endemic in more than 100 countries.
I. Dengue fever, also called dengue, is a potentially serious disease caused by a virus. There are four types of dengue virus that can cause illness in humans (DEN-1, DEN-2, DEN-3 and DEN-4).
II. Dengue is rare in the U.S., but is common and a serious public health threat in warm sub-tropical and tropical areas of the world. It is most common in urban areas and outbreaks occur commonly during the rainy season when mosquitoes breed heavily in standing water.
III. The incidence of dengue fever is on the rise worldwide, and in some areas of Asia, complications of the disease are a leading cause of serious illness and death in children.
I. Dengue viruses are transmitted between humans by the bite of an infected Aedes mosquito.
A. Mosquitoes pick up a dengue virus when they bite a human who is already infected with the virus.
1. The mosquito then carries it in its own blood and spreads it when it bites other humans.
2. After a dengue virus enters the human bloodstream, it spreads throughout the body.
B. There are a number of systems common to recognise these Dengue fevers occur.
II. Symptoms appear in about eight to ten days after a bite from an infected mosquito.
A. Symptoms are flu-like and can include high fever, nausea, vomiting, body aches, and headache.
B. Most people can recover from dengue fever, but some cases can progress into a life-threatening complication called dengue hemorrhagic fever. Symptoms of this disease include severe, uncontrolled haemorrhage and shock.
III. These methods guarantee prevention of Dengue fever.