लक्षण और कारण
observation
The symptoms of dengue are rashes, eye pain, nausea or vomiting, and muscle pain.
If you live in or are traveling to an area where dengue is common, seek medical attention immediately if you have symptoms of severe dengue. These include abdominal pain, blood in vomit or stool, bleeding gums or nose, repeated vomiting, or extreme fatigue or discomfort.
What is dengue fever?
Dengue fever is an illness you can get from a bite from a mosquito carrying one of four types of dengue virus (DENV). The virus is most commonly found in tropical and subtropical regions, including Central and South America, Africa, parts of Asia, and the Pacific Islands.
Dengue does not spread from person to person, except when it spreads from a pregnant woman to her baby. Symptoms of your first infection are usually mild, but if you get a second infection with another version of DENV, your risk of serious complications increases.
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Who does dengue fever affect?
Dengue is most common in Central and South America, Africa, parts of Asia, and the Pacific Islands. Dengue is also found in parts of the United States. People living in or traveling to these areas – more than half the world's population – are most at risk. Children and the elderly are at higher risk for severe illness.
How common is dengue fever?
Research estimates that about 400 million people are infected with dengue each year, but most (about 80%) do not develop any symptoms.
Can you become immune to dengue fever?
Yes, after being infected with the dengue virus you can acquire immunity to any of its variants. Since there are at least four strains of the virus (DENV), it is quite complex.
Your immune system has tools it can use to recognize infections and better fight them. When your body fights a virus, it digs into its toolbox to figure out which tool (antibodies) it has that can destroy that specific threat.
Antibodies are specific to each harmful virus that attacks your body, fitting them like a key to a lock. The antibodies latch on to their specific target and your immune system destroys it. Once your body learns to fight that specific virus, you are less likely to get sick again.
एक बार जब आप DENV के चार प्रकारों में से किसी एक से संक्रमित हो जाते हैं, तो आपको यह दोबारा नहीं हो सकता। लेकिन उस प्रकार के एंटीबॉडी दूसरे प्रकारों के साथ पूरी तरह से फिट नहीं होते। इसलिए अगर आप बाद में DENV के किसी दूसरे प्रकार से संक्रमित हो जाते हैं, तो यह वास्तव में इस अपूर्ण फिट का उपयोग करके आपके प्रतिरक्षा तंत्र को धोखा दे सकता है (एंटीबॉडी-निर्भर वृद्धि)।
The different strain may be grabbed by antibodies from your first strain and drawn into your cells, but — for reasons not fully understood — it is not destroyed. It then stays inside your cells and your cells have no idea it is harmful. This makes it easier for the virus to infect you and cause more severe illness.
लक्षण और कारण
डेंगू बुखार के लक्षण क्या हैं?
ज़्यादातर डेंगू संक्रमण लक्षण पैदा नहीं करते हैं। अगर आपको लक्षण हैं, तो तेज़ बुखार (104°F/40°C) होना आम बात है, साथ ही:
खरोंच।
Sharp pain behind your eyes.
nausea or vomiting .
Pain in muscles, bones and joints.
Symptoms of dengue fever appear four to 10 days after a mosquito bite and can last three to seven days. About 1 in 20 people with dengue may develop severe dengue after the initial symptoms have subsided.
Severe Dengue (Dengue Hemorrhagic Fever)
In severe dengue, the worsening of dengue symptoms can be life-threatening. The warning signs of severe dengue usually appear 24 to 48 hours after the fever has gone.
Severe dengue is a medical emergency that can be fatal. If you have dengue or live in an area where dengue is common, go to the nearest emergency room immediately if you have any of these symptoms:
पेट/उदर दर्द।
बार-बार उल्टी आना।
खून की उल्टी होना या मल में खून आना।
नाक से खून आना या मसूड़ों से खून आना।
अत्यधिक थकान, बेचैनी या चिड़चिड़ापन।
डेंगू बुखार किस कारण से होता है?
Dengue fever is caused by one of four dengue viruses. When a mosquito infected with the dengue virus bites you, the virus can enter your blood and make copies of itself. The virus and your immune system's response can make you feel sick.
The virus can destroy the parts of your blood that form clots and provide structure to your blood vessels. This, combined with certain chemicals made by your immune system, can cause your blood to leak out of your vessels and cause internal bleeding. This leads to life-threatening symptoms of severe dengue.
How does dengue fever spread?
Dengue is spread by Aedes mosquitoes, which also spread viruses such as Zika and chikungunya. The mosquito bites someone with dengue fever and then bites someone else, causing that person to become infected.
Is dengue fever contagious?
Dengue fever is not directly contagious from person to person like the flu. Dengue is transmitted from person to person only when a pregnant woman becomes infected. If you are pregnant and you get dengue, you can pass it on to your baby during pregnancy or delivery.
निदान और परीक्षण
How is dengue fever diagnosed?
Dengue fever is diagnosed with a blood test. Your healthcare provider will take a blood sample through a vein and send it to a laboratory to check for signs of the dengue virus. This can also reveal which of the four versions you have. Your provider may use the blood test to check for other viruses that cause similar symptoms.
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