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  1. Dengue fever - Symptoms and causes - Mayo Clinic

    www.mayoclinic.org › diseases-conditions › dengue
    • Overview
    • Symptoms
    • Causes
    • Risk Factors
    • Complications
    • Prevention

    Dengue (DENG-gey) fever is a mosquito-borne disease that occurs in tropical and subtropical areas of the world. Mild dengue fever causes a high fever, rash, and muscle and joint pain. A severe form of dengue fever, also called dengue hemorrhagic fever, can cause severe bleeding, a sudden drop in blood pressure (shock) and death.Millions of cases of dengue infection occur worldwide each year. Dengue fever is most common in Southeast Asia and the western Pacific islands, but the disease has bee...

    Many people, especially children and teens, may experience no signs or symptoms during a mild case of dengue fever. When symptoms do occur, they usually begin four to seven days after you are bitten by an infected mosquito.Dengue fever causes a high fever — 104 F degrees — and at least two of the following symptoms: 1. Headache 2. Muscle, bone and joint pain 3. Nausea 4. Vomiting 5. Pain behind the eyes 6. Swollen glands 7. RashMost people recover within a week or so. In some cases, symptoms...

    Dengue fever is caused by any one of four types of dengue viruses spread by mosquitoes that thrive in and near human lodgings. When a mosquito bites a person infected with a dengue virus, the virus enters the mosquito. When the infected mosquito then bites another person, the virus enters that person's bloodstream.After you've recovered from dengue fever, you have immunity to the type of virus that infected you — but not to the other three dengue fever virus types. The risk of developing seve...

    Factors that put you at greater risk of developing dengue fever or a more severe form of the disease include: 1. Living or traveling in tropical areas. Being in tropical and subtropical areas increases your risk of exposure to the virus that causes dengue fever. Especially high-risk areas are Southeast Asia, the western Pacific islands, Latin America and the Caribbean. 2. Prior infection with a dengue fever virus. Previous infection with a dengue fever virus increases your risk of having seve...

    If severe, dengue fever can damage the lungs, liver or heart. Blood pressure can drop to dangerous levels, causing shock and, in some cases, death.

    One dengue fever vaccine, Dengvaxia, is currently approved for use in those ages 9 to 45 who live in areas with a high incidence of dengue fever. The vaccine is given in three doses over the course of 12 months. Dengvaxia prevents dengue infections slightly more than half the time.The vaccine is approved only for older children because younger vaccinated children appear to be at increased risk of severe dengue fever and hospitalization two years after receiving the vaccine.The World Health Or...

  2. Symptoms and Treatment | Dengue | CDC

    www.cdc.gov › dengue › symptoms

    Symptoms of severe dengue Belly pain, tenderness Vomiting (at least 3 times in 24 hours) Bleeding from the nose or gums Vomiting blood, or blood in the stool Feeling tired, restless, or irritable

  3. Dengue Fever: Symptoms, Signs, Causes & Treatment

    www.medicinenet.com › dengue_symptoms_and_signs

    Primary symptoms of dengue appear three to 15 days after the mosquito bite and include high fever and severe headache, with severe pain behind the eyes that is apparent when trying to move the eyes. Other associated symptoms are joint pain, muscle and bone pain, rash, and mild bleeding. Many affected people complain of low back pain.

  4. What is chikungunya fever, and should I be worried? - Mayo Clinic

    www.mayoclinic.org › diseases-conditions

    Aug 20, 2020 · Answer From Scott C. Litin, M.D. Chikungunya (chik-un-GUN-yuh) is a viral illness transmitted by mosquitoes that causes the sudden onset of fever and severe joint pain. Other signs and symptoms may include fatigue, muscle pain, headache and rash.

  5. Typhoid fever - Symptoms and causes - Mayo Clinic

    www.mayoclinic.org › symptoms-causes › syc-20378661
    • Overview
    • Symptoms
    • Causes
    • Risk Factors
    • Complications
    • Prevention

    Typhoid fever is caused by Salmonella typhi bacteria. Typhoid fever is rare in industrialized countries. However, it remains a serious health threat in the developing world, especially for children.Typhoid fever spreads through contaminated food and water or through close contact with someone who's infected. Signs and symptoms usually include a high fever, headache, abdominal pain, and either constipation or diarrhea.Most people with typhoid fever feel better within a few days of starting ant...

    Signs and symptoms are likely to develop gradually — often appearing one to three weeks after exposure to the disease.

    Typhoid fever is caused by virulent bacteria called Salmonella typhi. Although they're related, Salmonella typhi and the bacteria responsible for salmonellosis, another serious intestinal infection, aren't the same.

    Typhoid fever remains a serious worldwide threat — especially in the developing world — affecting an estimated 26 million or more people each year. The disease is established (endemic) in India, Southeast Asia, Africa, South America and many other areas.Worldwide, children are at greatest risk of getting the disease, although they generally have milder symptoms than adults do.If you live in a country where typhoid fever is rare, you're at increased risk if you: 1. Work in or travel to areas w...

    The most serious complications of typhoid fever — intestinal bleeding or holes (perforations) in the intestine — may develop in the third week of illness. A perforated intestine occurs when your small intestine or large bowel develops a hole, causing intestinal contents to leak into your abdominal cavity and triggering signs and symptoms such as severe abdominal pain, nausea, vomiting and bloodstream infection (sepsis). This life-threatening complication requires immediate medical care.

    In many developing nations, the public health goals that can help prevent and control typhoid fever — safe drinking water, improved sanitation and adequate medical care — may be difficult to achieve. For that reason, some experts believe that vaccinating high-risk populations is the best way to control typhoid fever.A vaccine is recommended if you live in or you're traveling to areas where the risk of getting typhoid fever is high.

  6. Dandruff - Symptoms and causes - Mayo Clinic

    www.mayoclinic.org › symptoms-causes › syc-20353850
    • Overview
    • Symptoms
    • Causes
    • Risk Factors

    Dandruff is a common condition that causes the skin on the scalp to flake. It isn't contagious or serious. But it can be embarrassing and difficult to treat.Mild dandruff can be treated with a gentle daily shampoo. If that doesn't work, a medicated shampoo may help. Symptoms may return later.Dandruff is considered to be a mild form of seborrheic dermatitis. In babies, seborrheic dermatitis is called cradle cap.

    Dandruff signs and symptoms may include: 1. Skin flakes on your scalp, hair, eyebrows, beard or mustache, and shoulders 2. Itchy scalp 3. Scaly, crusty scalp in infants with cradle capThe signs and symptoms may be more severe if you're stressed, and they tend to flare in cold, dry seasons.

    Dandruff may have several causes, including: 1. Irritated, oily skin 2. Not shampooing enough 3. A yeastlike fungus (malassezia) that feeds on oils on the scalps of most adults 4. Dry skin 5. Sensitivity to hair care products (contact dermatitis) 6. Other skin conditions, such as psoriasis and eczema

    Almost anyone can have dandruff, but certain factors can make you more susceptible: 1. Age. Dandruff usually begins in young adulthood and continues through middle age. That doesn't mean older adults don't get dandruff. For some people, the problem can be lifelong. 2. Being male. Because more men have dandruff, some researchers think male hormones may play a role. 3. Certain illnesses. Parkinson's disease and other diseases that affect the nervous system also seem to increase risk of dandruff...

  7. Dengue Hemorrhagic Fever: Causes, Symptoms & Diagnosis

    www.healthline.com › health › dengue-hemorrhagic-fever

    Jul 08, 2017 · Dengue virus rarely causes death. However, the infection can progress into a more serious condition known as severe dengue or dengue hemorrhagic fever. Symptoms of dengue hemorrhagic fever include:...

  8. Malaria - Symptoms and causes - Mayo Clinic

    www.mayoclinic.org › symptoms-causes › syc-20351184
    • Overview
    • Symptoms
    • Causes
    • Risk Factors
    • Complications
    • Prevention
    • The Mayo Clinic Experience and Patient Stories

    Malaria is a disease caused by a parasite. The parasite is transmitted to humans through the bites of infected mosquitoes. People who have malaria usually feel very sick, with a high fever and shaking chills. Each year, approximately 210 million people are infected with malaria, and about 440,000 people die from the disease. Most of the people who die from the disease are young children in Africa.While the disease is uncommon in temperate climates, malaria is still common in tropical and subt...

    A malaria infection is generally characterized by the following signs and symptoms: 1. Fever 2. Chills 3. Headache 4. Nausea and vomiting 5. Muscle pain and fatigueOther signs and symptoms may include: 1. Sweating 2. Chest or abdominal pain 3. CoughSome people who have malaria experience cycles of malaria \\"attacks.\\" An attack usually starts with shivering and chills, followed by a high fever, followed by sweating and a return to normal temperature. Malaria signs and symptoms typically begin w...

    Malaria is caused by a type of microscopic parasite. The parasite is transmitted to humans most commonly through mosquito bites.

    The biggest risk factor for developing malaria is to live in or to visit areas where the disease is common. There are many different varieties of malaria parasites. The variety that causes the most serious complications is most commonly found in: 1. African countries south of the Sahara Desert 2. The Asian subcontinent 3. New Guinea, the Dominican Republic and Haiti

    Malaria can be fatal, particularly malaria caused by the variety of parasite that's common in tropical parts of Africa. The Centers for Disease Control and Prevention estimates that 91 percent of all malaria deaths occur in Africa — most commonly in children under the age of 5.In most cases, malaria deaths are related to one or more serious complications, including: 1. Cerebral malaria. If parasite-filled blood cells block small blood vessels to your brain (cerebral malaria), swelling of your...

    If you live in or are traveling to an area where malaria is common, take steps to avoid mosquito bites. Mosquitoes are most active between dusk and dawn. To protect yourself from mosquito bites, you should: 1. Cover your skin. Wear pants and long-sleeved shirts. 2. Apply insect repellant to skin and clothing. Sprays containing DEET can be used on skin and sprays containing permethrin are safe to apply to clothing. 3. Sleep under a net. Bed nets, particularly those treated with insecticide, he...

    Our patients tell us that the quality of their interactions, our attention to detail and the efficiency of their visits mean health care like they've never experienced. See the stories of satisfied Mayo Clinic patients.

  9. Dengue Fever: Symptoms, Causes, and Treatments

    www.webmd.com › a-to-z-guides › dengue-fever
    • Overview
    • Epidemiology
    • Causes
    • Symptoms

    Dengue (pronounced DENgee) fever is a painful, debilitating mosquito-borne disease caused by any one of four closely related dengue viruses. These viruses are related to the viruses that cause West Nile infection and yellow fever.

    An estimated 390 million dengue infections occur worldwide each year, with about 96 million resulting in illness. Most cases occur in tropical areas of the world, with the greatest risk occurring in: Most cases in the United States occur in people who contracted the infection while traveling abroad. But the risk is increasing for people living along the Texas-Mexico border and in other parts of the southern United States. In 2009, an outbreak of dengue fever was identified in Key West, Fla.

    Dengue fever is transmitted by the bite of an Aedes mosquito infected with a dengue virus. The mosquito becomes infected when it bites a person with dengue virus in their blood. It cant be spread directly from one person to another person.

    Symptoms, which usually begin four to six days after infection and last for up to 10 days, may include Sometimes, symptoms are mild and can be mistaken for those of the flu or another viral infection. Younger children and people who have never had the infection before tend to have milder cases than older children and adults. However, serious problems can develop. These include dengue hemorrhagic fever, a rare complication characterized by high fever, damage to lymph and blood vessels, bleeding from the nose and gums, enlargement of the liver, and failure of the circulatory system. The symptoms may progress to massive bleeding, shock, and death. This is called dengue shock syndrome (DSS).

    • Mary Anne Dunkin