Dengue fever is a disease caused by a family of viruses that are transmitted by mosquitoes. It is an acute illness of sudden onset that usually follows a benign course with headache, fever, exhaustion, severe joint and muscle pain, swollen glands, and rash. A more serious but less common form of the disease, dengue hemorrhagic fever (DHF), may cause severe and fatal internal bleeding. Dengue fever and DHF are caused by any of four different viruses, and are transmitted from one person to another by the female mosquito of two species of the Aedes aegypti.
Signs and Symptoms of Dengue Fever
The incubation period (time between infection and onset of symptoms) of dengue fever is five to eight days. The fever typically runs its course in six to seven days, but convalescence is usually slow. Dengue Fever starts with chills, headache, pain upon moving the eyes, and low backache. Painful aching in the legs and joints occurs during the first hours of illness. The temperature rises quickly as high as 104° F (40° C), with relative low heart rate and low blood pressure. The eyes become reddened. A flushing or pale pink rash comes over the face and then disappears. The glands (lymph nodes) in the neck and groin are often swollen. Fever and other signs of dengue last for two to four days, followed by rapid drop in temperature with profuse sweating. This precedes a period with normal temperature and a sense of well-being that lasts about a day. A second rapid rise in temperature follows. A characteristic rash appears along with the fever and spreads from the extremities to cover the entire body except the face. The palms and soles may be bright red and swollen.
Preventive Measures
The transmission of the virus to mosquitoes must be interrupted to prevent the illness. The prevention of dengue requires control or eradication of the mosquitoes carrying the virus that causes dengue. In nations plagued by dengue fever, people are urged to empty stagnant water from old tires, trash cans, and flower pots. Wear long pants and long sleeves. The most effective preventive measure is the use of mosquito repellent. The Aedes aegypti mosquito is a daytime biter with peak periods of biting around sunrise and sunset. It may bite at any time of the day and is often hidden inside homes or other dwellings, especially in urban areas. Remember better safe than sorry. As yet no successful vaccine for dengue fever has been developed.
Signs and Symptoms of Dengue Fever
The incubation period (time between infection and onset of symptoms) of dengue fever is five to eight days. The fever typically runs its course in six to seven days, but convalescence is usually slow. Dengue Fever starts with chills, headache, pain upon moving the eyes, and low backache. Painful aching in the legs and joints occurs during the first hours of illness. The temperature rises quickly as high as 104° F (40° C), with relative low heart rate and low blood pressure. The eyes become reddened. A flushing or pale pink rash comes over the face and then disappears. The glands (lymph nodes) in the neck and groin are often swollen. Fever and other signs of dengue last for two to four days, followed by rapid drop in temperature with profuse sweating. This precedes a period with normal temperature and a sense of well-being that lasts about a day. A second rapid rise in temperature follows. A characteristic rash appears along with the fever and spreads from the extremities to cover the entire body except the face. The palms and soles may be bright red and swollen.
Preventive Measures
The transmission of the virus to mosquitoes must be interrupted to prevent the illness. The prevention of dengue requires control or eradication of the mosquitoes carrying the virus that causes dengue. In nations plagued by dengue fever, people are urged to empty stagnant water from old tires, trash cans, and flower pots. Wear long pants and long sleeves. The most effective preventive measure is the use of mosquito repellent. The Aedes aegypti mosquito is a daytime biter with peak periods of biting around sunrise and sunset. It may bite at any time of the day and is often hidden inside homes or other dwellings, especially in urban areas. Remember better safe than sorry. As yet no successful vaccine for dengue fever has been developed.
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