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Malaria Viral Infection : The Facts Behind This Disease And Effective Prevention

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  Malaria Viral Infection : The Facts Behind This Disease And Effective Prevention

Wednesday, February 1,2017

Malaria is a disease that can be fatal, due to parasites. Plasmodium parasites are transmitted by infected Anopheles mosquitoes, which usually bite at night.

The disease occurs mainly in the tropical regions of Africa and South-East Asia. But it can also be found in many countries, such as Mexico, Central America, South America, the Middle East, Turkey, Pakistan, India and several Asian countries such as China .

There are four types of human malaria. The two most common are Plasmodium falciparum (the most deadly) and Plasmodium vivax. Plasmodium malariae and Plasnmodium ovale are also found.

Malaria can be cured. By following an appropriate treatment, parasites can be eliminated entirely from the body of the affected person. The parasite types, P. vivax and P. ovale include stages of the parasite that can remain in the liver without causing symptoms.

If they are not treated with the right treatment, the right dosage, these stages can be reactivated and cause a relapse of the disease even after several months or years. The P. malariae type can also remain in the blood for decades if left untreated.

In recent years, monkey malaria (Plasmodium knowles) has been recorded in humans in some forests in South-east Asia.

Transmission of malaria

Anopheles mosquitoes become infected when they bite a person with malaria. The small amount of blood they take contains parasites. These mix with their saliva and are in turn injected to the next person they sting.

In the human body, parasites reach the liver and can remain dormant for several days, up to several months (depending on the parasite). When the parasites are mature, they attack the blood cells. It is at this moment that the affected people feel the symptoms of malaria.

As the parasite is present in the blood cells, malaria can also be transmitted through blood transfusion, organ transplantation or the sharing of contaminated needles. Malaria can also be transmitted from a pregnant mother to her child before or at birth.

Diagnosis

To ensure the presence of malaria, a diagnostic test can be performed. A drop of blood analyzed under a microscope makes it possible to identify the presence of the parasite.

Rapid diagnostic tests, in the form of test strips, detect specific antigens produced by malaria parasites and present in the blood. These tests are usually used in the field by travelers or small organizations to quickly and efficiently assess populations affected by the disease.

Complications

Most cases of malaria-related mortality are due to the consequences of the complications of the disease; It is estimated that 90% of malaria deaths , occur in children under 5 years of age.

Brain damage (cerebral malaria): when blood cells infected by the parasite reach the brain, causing delirium, loss of consciousness, coma or death.

Pulmonary edema: an accumulation of fluid in the lungs that can cause severe respiratory problems.
Insufficiency of organs such as kidneys or liver, or rupture of the spleen that can cause death.

Severe anemia caused by the destruction of infected red blood cells.
Falling sugar in the blood: due to some severe forms of the disease that can cause coma or death.

The recurrence of episodes: certain strains of the malaria parasite, which usually cause less severe forms of the disease, can persist in the body for years and cause relapses.

Symptoms of malaria

Symptoms occur between 10 and 15 days after the infection of the infected insect. Some types of malaria parasites (Plasmodium vivax and Plasmodium ovale) may remain inactive in the liver for weeks or even months before the first signs appear.

Malaria is characterized by recurring attacks involving three phases:

Chills ;
Headaches ;
Tiredness and muscle pain;
Nausea and vomiting;
Diarrhea (occasionally).
An hour or two later:

Strong fevers;
The skin becomes hot and dry.

Then, the body temperature drops:

Abundant sweat;
Tiredness and weakness;
The affected person falls asleep.
P. vivax and P. ovale malaria infections may have relapses a few weeks or even months after the first infection even if the patient has left the area of ​​infection. These new episodes are due to “dormant” liver forms.

People at Risk

Travelers, children or adults from countries where malaria is not present and therefore have not developed immunity;

Residents of areas where malaria is present may be frequently exposed to the disease, thus acquiring partial immunity, which may alleviate the severity of the symptoms. However, this immunity may disappear by moving to a country where the parasite is absent;

Pregnant women and their unborn child;
People living with HIV / AIDS;
People who undergo a blood transfusion (rarely).

Risk factors

Living or visiting the tropical regions where malaria is common and where the present strains cause the most deaths, for example:

African countries south of the Sahara desert;
The countries of the Indian subcontinent;
The Solomon Islands, Papua New Guinea and Haiti.

The prevention of malaria

If left untreated within 24 hours, Plasmodium falciparum malaria can present severe and often fatal complications;
Malaria is a preventable disease that can be cured;
Unimmunized travelers from areas free of malaria are very vulnerable to the disease when infected.

Basic Preventive Measures

Preventive medicines

If you plan to travel to an area where malaria is present, medicines can be consumed a few days or weeks before, during and after your trip. They protect against parasites of malaria.
Reduce exposure to mosquitoes.

The use of insect repellents (those containing DEET 20% to 35% or Picaridin 20%) are most effective for spraying house walls, clothing or skin.

Sleeping under a mosquito net impregnated or not with insecticide (permethrine);
Cover the skin with long pants and sleeves after sunset;

Avoid going out of the sunset till dawn.

Measures to prevent aggravation

If the symptoms of the disease are felt after traveling to a country affected by malaria, it is better to carry out a diagnostic test without delay, as the consequences of the disease can be fatal.

Published On

Wednesday, February 1,2017-01:14:39 AM[London]

URL: http://www.healthyeve.com/malaria-viral-infection-facts-disease-effective-prevention/

You Could Find More About This Article Via Useful Links: 

http://www.medicalnewstoday.com/articles/150670.php

http://www.healthline.com/health/malaria

http://www.who.int/mediacentre/factsheets/fs094/en/

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