Dengue fever is a dangerous and contagious disease caused by a virus typically carried by mosquitoes. This virus can spread rapidly, particularly through certain species of mosquitoes, and is common in tropical and subtropical regions. Approximately 4 billion people worldwide live in areas at risk of dengue fever.

Dengue fever, or dangue virus, is a viral infection spread between individuals through the bite of the Aedes mosquito. Symptoms include high fever, headache, body aches, nausea, and a rash. While it may cause mild symptoms in some people, it can lead to serious complications in others.

If you have visited a tropical region or been in contact with an infected person and are experiencing symptoms, it's important to contact your nearest healthcare provider. Dengue fever can be controlled with early diagnosis and appropriate treatment. In general, taking precautions against mosquito bites can also help prevent the spread of this disease.

Causes of dengue fever

Dengue fever is caused by the Aedes mosquito, which carries the dengue virus and transmits it to humans. This mosquito species typically breeds in wetlands and lays eggs in populated areas.

How is dengue fever spread?

Dengue fever is typically spread by a species of mosquito called the Aedes. Mosquitoes can bite many different people at any time of day. When an uninfected mosquito bites an infected individual, it becomes a carrier of the virus itself. The Aedes mosquito, in particular, can transmit the virus by biting people regardless of day or night.

Dengue virus can, in rare cases, be transmitted through situations such as blood transfusions or needlestick injuries. There is also a risk of mother-to-child transmission during pregnancy. Therefore, taking precautions against mosquito bites and limiting contact with infected individuals are important in preventing the spread of dengue fever.

What are the dengue threat groups?

Although dengue fever can affect people of all ages, certain groups may be at greater risk. Specifically:

• Children and the elderly: Dengue fever can occur at any age, but children and the elderly tend to develop more severe symptoms.
• Pregnant women: When pregnant women contract dengue fever, they may be at risk of transmitting the virus to their fetus, which can lead to pregnancy complications.
• Those with a weak immune system: Those with a weak immune system, such as those with another disease or condition, may be more susceptible to dengue fever.

These risk groups may require special attention and precautions to manage dengue fever. Furthermore, taking precautions against mosquito bites can reduce the spread of the disease overall.

How is dengue fever diagnosed?

Diagnosis of dengue fever is generally based on clinical signs and laboratory tests. Initially, the patient's symptoms and medical history are evaluated. A patient suspected of having dengue fever typically undergoes a diagnostic process that includes the following steps:

• Patient evaluation: Evaluation of patients presenting with symptoms such as high fever, headache, muscle and joint pain, nausea and rash.
• Illness history: The patient provides a detailed illness history, including onset of symptoms, course, and possible exposures.
• Physical examination: The doctor performs a physical examination to assess the patient's general health.
• Laboratory tests: Dengue fever is usually diagnosed through blood tests. PCR (Polymerase Chain Reaction) tests are used to confirm the presence of the virus. Additionally, the patient's blood count, liver function tests, and other blood components are evaluated.

Diagnosis is often most effective within the first few days after symptoms begin. Early diagnosis can help initiate appropriate treatment and prevent the disease from progressing to more serious complications. If a patient notices symptoms or suspects dengue fever, it's important to contact a healthcare professional immediately.

How to treat dengue fever?

Treatment for dengue fever generally involves supportive care and symptom relief. While there is no specific antiviral treatment or medication, management of the disease includes the following:

• Rest and fluid intake: Rest and adequate fluid intake can help patients replace fluid loss. This is especially important for compensating for fluid loss caused by fever.
• Pain and fever medications: Pain relievers and fever reducers can be used to relieve symptoms such as headache, muscle and joint pain. However, aspirin should be avoided because it can increase the risk of bleeding.
• Hospitalization: In severe cases of dengue fever, hospitalization may be necessary to monitor the patient's condition and administer intravenous fluid therapy or other supportive measures if necessary.

Treatment, particularly focusing on balanced hydration and symptom relief, generally helps people with dengue fever recover. A healthcare professional will determine the appropriate treatment plan based on the severity of the illness. Additionally, taking precautions against mosquito bites can also help prevent the spread of the disease.

Is dengue fever contagious from person to person?

Dengue fever is not usually spread through direct human-to-human transmission. The disease is transmitted primarily through the bites of mosquitoes of the Aedes genus. The virus is acquired from a person during a blood meal by an infected mosquito and then transmitted to another person through a bite. These mosquito species are typically found in tropical and subtropical regions.

However, in rare cases, the dengue virus can be transmitted from mother to child during pregnancy or birth. It can also be transmitted through blood transfusions or needlestick injuries, although these routes are generally less common than mosquito bites.

How many days does dengue fever last?

The duration of dengue fever varies depending on the severity of the illness. Generally, if the illness is severe, recovery can take up to a week. However, in milder cases, recovery can often take two days or more.

Does dengue fever recur?

Dengue fever is a disease that comes in many varieties. Generally, after contracting one type of dengue, a person develops immunity to the disease caused by that type. However, this immunity does not extend to other types of dengue. Therefore, even if a person becomes immune to one type of dengue, they may still be at risk of contracting another type. This means that a person who has had dengue fever once can become infected again if exposed to cases of dengue caused by different types.

Dengue fever: A deadly threat?

Dengue fever has varying effects depending on an individual's overall health and immune system. This disease can be more severe and debilitating, particularly in individuals with weakened immune systems and those in at-risk groups. As the severity of dengue fever increases, the risk of fatality also increases. In such cases, it is important to seek professional help from the nearest healthcare facility when symptoms appear or worsen. Rapid intervention and appropriate treatment can control the course of the disease and prevent serious complications.

 Dengue virus (Dengue fever) Prevention methods and vaccine

The first dengue vaccine, approved by the Food and Drug Administration in 2019, protects against infections caused by four different viral agents. This vaccine is recommended for individuals ages 9 to 16, those with a history of dengue, and those living in Puerto Rico, American Samoa, Guam, and the Virginia Islands.

However, people who don't meet these criteria can reduce their risk of infection by using various mosquito bite prevention methods. These measures may include:

• Preferring clothes that hug the body.
• Applying mosquito repellent products to the body.
• Covering the surrounding area with netting and covering the doors and windows with wire.
• Using insect repellent products before camping and outdoor activities.
• If possible, avoid going out at dawn, sunset or early hours.
• Preventing puddles and avoiding living near water.

While dengue fever usually presents with mild symptoms, it can develop into a serious one in some cases. Fever, joint pain, and skin rashes are common symptoms. In more severe cases, symptoms such as persistent vomiting, gum bleeding, and nosebleeds may occur. In these cases, emergency medical attention may be necessary. It is important for individuals experiencing these symptoms to seek immediate medical attention.