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 subtropical countries. World health officials are trying to reduce the incidence of malaria by distributing bed nets to help protect people from mosquito bites as they sleep. Scientists around the world are working to develop a vaccine to prevent malaria.
If you're traveling to locations where malaria is common, take steps to prevent mosquito bites by wearing protective clothing, using insect repellants and sleeping under treated mosquito nets. Depending on the area you are visiting and your individual risk factors for infection, you may also want to take preventive medicine before, during and after your trip. Many malaria parasites are now resistant to the most common drugs used to treat the disease.
Malaria is a life-threatening disease. It’s typically transmitted through the bite of an infected Anopheles mosquito. Infected mosquitoes carry the Plasmodium parasite. When this mosquito bites you, the parasite is released into your bloodstream.
Once the parasites are inside your body, they travel to the liver, where they mature. After several days, the mature parasites enter the bloodstream and begin to infect red blood cells.
Within 48 to 72 hours, the parasites inside the red blood cells multiply, causing the infected cells to burst open.
The parasites continue to infect red blood cells, resulting in symptoms that occur in cycles that last two to three days at a time.
Malaria is typically found in tropical and subtropical climates where the parasites can live. The World Health Organization (WHO)Trusted Source states that, in 2016, there were an estimated 216 million cases of malaria in 91 countries.
In the United States, the Centers for Disease Control and Prevention (CDC) report 1,700 casesTrusted Source of malaria annually. Most cases of malaria develop in people who travel to countries where malaria is more commo
Malaria can occur if a mosquito infected with the Plasmodium parasite bites you. There are four kinds of malaria parasites that can infect humans: Plasmodium vivax, P. ovale, P. malariae, and P. falciparum.
Malaria is transmitted by blood, so it can also be transmitted through:
The symptoms of malaria typically develop within 10 days to 4 weeks following the infection. In some cases, symptoms may not develop for several months. Some malarial parasites can enter the body but will be dormant for long periods of time.(up to 20years)
Common symptoms of malaria include:
Your doctor will be able to diagnose malaria. During your appointment, your doctor will review your health history, including any recent travel to tropical climates. A physical exam will also be performed. Positive Physical findings are:
Endemic zones of malaria in Bangladesh are Khagrachori, Bandarban, Rangamati, Chittagong, Cox’s bazar,Sylhet, Hobiganj, Moulovibazar, Sunamganj, Netrokona, Kurigram, Sherpur and Mymensingh.
Your doctor will be able to determine if you have an enlarged spleen or liver. If you have symptoms of malaria, your doctor may order additional blood tests to confirm your diagnosis.
These tests will show:
Malaria can cause a number of life-threatening complications. The following may occur:
Malaria can be a life-threatening condition, especially if you’re infected with the parasite P. falciparum. Treatment for the disease is typically provided in a hospital. Your doctor will prescribe medications based on the type of parasite that you have.
In some instances, the medication prescribed may not clear the infection because of parasite resistance to drugs. If this occurs, your doctor may need to use more than one medication or change medications altogether to treat your condition.
Additionally, certain types of malaria parasites, such as P. vivax and P. ovale, have liver stages where the parasite can live in your body for an extended period of time and reactivate at a later date causing a relapse of the infection.
If you’re found to have one of these types of malaria parasites, you’ll be given a second medication to prevent a relapse in the future.
People with malaria who receive treatment typically have a good long-term outlook. If complications arise as a result of malaria, the outlook may not be as good. Cerebral malaria, which causes swelling of the blood vessels of the brain, can result in brain damage.
The long-term outlook for patients with drug-resistant parasites may also be poor. In these patients, malaria may recur. This may cause other complications.
There’s no vaccine available to prevent malaria. Talk to your doctor if you’re traveling to an area where malaria is common or if you live in such an area. You may be prescribed medications to prevent the disease.
These medications are the same as those used to treat the disease and should be taken before, during, and after your trip.
Talk to your doctor about long-term prevention if you live in an area where malaria is common. Sleeping under a mosquito net may help prevent being bitten by an infected mosquito. Covering your skin or using bug sprays containing DEET may also help prevent infection.
If you’re unsure if malaria is prevalent in your area, the CDC has an up-to-date mapTrusted Source of where malaria can be found.