Dengue Fever : It’s Symptoms & Treatment



  1. High Fever : Sudden onset of a high fever, often reaching up to 104 degree F (40 degree C).
  2. Severe Headache : Intense and persistent headache are a common symptoms of dengue fever.
  3. Pain Behind the Eyes : Pain or discomfort behind the eyes, especially when moving them.
  4. Joint and Muscle Pain : Severe joint and muscle pain, often referred to as “breakbone fever.”
  5. Fatigue : Overwhelming fatigue and weakness.
  6. Nausea and Vomiting : Feeling nauseous and vomiting may occur.
  7. Skin Rash : A rash may develop, which can vary from a mild red rash to a more widespread skin eruption.
  8. Mild Bleeding : Symptoms may include nosebleeds, gum bleeding, or easy bruising. Severe cases may experiences internal bleeding.


Diagnosis And Treatment

  1. Clinical Evaluation : Doctors often start with a clinical assessment, considering symptoms like sudden high fever, severe headaches, joint and muscle pain, and skin rash.
  2. Blood Tests :
    • PCR (Polymerase Chain Reaction) : This test detects the genetic material of the dengue virus.
    • NS1 Antigen Test : This rapid test identifies the presence of the dengue virus antigen in the blood.
    • IgM and IgG Antibody Tests : These tests measure the levels of antibodies produced in response to dengue infection.
  3. Complete Blood Count (CBC) : Dengue can cause a decrease in platelet count, so a CBC helps monitor platelet levels.
  1. Supportive Care :
    • Hydration : Maintaining fluid balance is crucial. Intravenous fluids may b administered in severe cases to prevent dehydration.
    • Pain Relief : Acetaminophen is often recommended for fever and pain. Avoid non-steroidal anti-inflammatory drugs (NSAIDSs) and aspirin, as they can increase the risk of bleeding
  2. Monitoring :
    • Regular monitoring of vital signs, platelet count, and hematocrit levels is essential, especially in severe cases.
  3. Hospitalization :
    • Severe dengue cases may require hospitalization for close monitoring and medical intervention.
  4. Blood Transfusion :
    • In cases of severe bleeding or a significant drop in platelet count, blood transfusions may be necessary.
  5. Symptomatic Relief :
    • Medications to alleviate symptoms, such as anti-emetics for nausea and vomiting, may be prescribed.
  6. Avoiding Certain Medications :
    • Patients are advised to avoid medications like aspirin and NSAIDs that can increase the risk of bleeding.

Dengue Transmission :

  1. Infected Human Hosts : Dengue virus is initially introduced into the human population when a mosquito bites a person already infected with the virus. This individual may be experiencing symptoms or may be an asymptomatic carrier.
  2. Mosquito Feeding : A female Aedes mosquito becomes infected with dengue virus when it bites an infected person during the acute phase of the illness. The virus enters the mosquito’s bloodstream during the feeding process.
  3. Incubation Period : The virus undergoes an incubation period within the mosquito, during which it multiplies and establishes an infection in the mosquito’s salivary glands.
  4. Transmission to Humans : After the virus has completed its incubation period, the infected mosquito can transmit the virus to humans during subsequent blood feedings. When an infected mosquito bites a susceptible person, it injects the dengue virus along with its saliva into the bloodstream, thereby transmitting the infection.

It’s important to note that dengue is not directly transmitted from person to person. Humans serve as hosts for the virus, and mosquitoes acts as the vectors that facilitate the transmission cycle. Additionally, the Aedes mosquitoes primarily responsible for dengue transmission are daytime feeders, with peak biting activity occurring during early morning and late afternoon.

Preventing dengue transmission involves controlling mosquito populations, eliminating breeding sites, and protecting individuals from mosquito bites through the use of bed nets, insect repellents, and other preventive measures. Community-wide efforts to reduce mosquito habitats and promote awareness about dengue prevention are essential in mitigating the spread of the virus.

Dengue Prevention and Control

  1. Mosquito Control :
    • Source Reduction : Eliminate or reduce mosquito breeding sites by regularly emptying and cleaning containers that collect and hold water (e.g. flower pots, tires, buckets).
    • Environmental Management : Proper waste disposal and sanitation help minimize potential breeding grounds for mosquitoes.
    • Use of Larvicides :Applying larvicides to water sources where mosquitoes breed can help control larvae and reduce mosquito populations.
    • Insecticide Spraying : Indoor and outdoor insecticide spraying can be employed to reduce adult mosquito populations.
  2. Personal Protection Measures :
    • Use of Mosquito Nets : Sleeping under bed nets, especially during the daytime when Aedes mosquitoes are active, can reduce the risk of mosquito bites.
    • Wearing Protective Clothing : Long-sleeved shirts, long pants, socks, and closed shoes can minimize exposed skin and reduce the likelihood of mosquito bites.
    • Insect Repellents : Applying mosquito repellents on exposed skin provides additional protection.
    • Immunity Boosters : Multivitamin like Vitamin B12 and Vitamin D are used as Immunity Boosters. Giloy an ayurvedic medicine also boosts immunity
  3. Community Engagement and Awareness :
    • Educational Campaigns : Raise awareness about dengue symptoms, transmission, and preventive measures through community workshops, seminars, and media campaigns.
    • Community Clean-Up Drives : Mobilize communities to participate in regular clean-up activities to eliminate potential mosquito breeding sites.
    • Involvement of Local Authorities : Collaboration with local health authorities, governments, and civic bodies is essential for implementing effective vector control measures and responding to outbreaks.
  4. Integrated Vector Management (IVM) :
    • Holistic Approach : Adopting an integrated approach that combines various strategies, including environmental management, larvicides, and insecticides, helps enhance the effectiveness of vector control efforts.
  5. Vaccination :
    • Dengue Vaccination : In regions where dengue is endemic, vaccination programs may be implemented to reduce the risk of infection.
  6. Early Detection and Healthcare Seeking :
    • Promote Early Medical Attention : Encourage individuals experiencing dengue-like symptoms to seek medical attention promptly for diagnosis and appropriate care.
  7. Research and Surveillance :
    • Vector Surveillance : Regular monitoring of mosquito populations and their infection rates can help predict and respond to potential outbreaks.
    • Epidemiological Surveillance : Tracking dengue cases and identifying hotspot enables targeted interventions and rescue allocation.

Causes of Dengue

  1. Virus Transmission
    • Aedes Mosquitoes : The primary vectors for the dengue virus are Aedes aegypti and, to a lesser extent, Aedes albopictus. These mosquitoes become infected with the virus when they bite a person already infected with dengue.
    • Human-Mosquitoes- Human Cycle : The virus circulates between infected humans and mosquitoes in a transmission cycle. Infected mosquitoes transmit the virus to humans through their bites, and infected humans can serve as sources of the virus for other mosquitoes.
  2. Virus Types and Serotypes :
    • Four Serotypes : The dengue virus has four distinct serotypes( DEN-1, DEN-2, DEN-3, and DEN-4). Infection with one serotype does not provide immunity against the others, and individuals can be infected multiple times with different serotypes.
  3. Global Distribution :
    • Tropical and Subtropical Regions : Dengue is prevalent in tropical and subtropical regions, where the Aedes mosquitoes thrive. These areas include parts of Asia, the Pacific Islands, the America, Africa, and the Middle East.
  4. Urbanization and Population Movement :
    • Increased Urbanization : The expansion of urban areas, along with factors like inadequate sanitation and water storage practices, contribute to the proliferation of mosquito breeding sites.
    • Population Movement : Travel and migration of infected individuals can introduce the virus to new areas and continue to the spread of dengue.
  5. Climate Factors :
    • Temperature and Rainfall : Aedes mosquitoes are sensitive to climate factors. Warm temperature and periods of heavy rainfall can create favorable conditions for mosquito breeding and dengue transmission.
  6. Lack of Immunity :
    • Limited Cross-Immunity : Infection with one serotypes of the virus does not provide long-term immunity against the other serotypes, and subsequent infection can lead to more severe forms of the disease.
  7. Vector Control Challenges :
    • Resistance to Control Measures : Aedes mosquitoes can adapt to various environment and breeding sites, making vector control challenging.
  8. Lack of Specific Treatment or Vaccine :
    • No Specific Antiviral Treatment : There is no specific antiviral treatment for dengue, and management primarily focuses on supportive care.
    • Vaccination Challenges : While dengue vaccine are available, their distribution and effectiveness can be limited, and they may not provide complete protection against all serotypes.

Worldwide Statistics of Dengue

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