Malaria is a sickness of the blood that is spread by infected mosquitoes. Malaria is very common all over the world. Malaria is common tropical disease and widespread throughout the tropics, but it also occurring in numerous temperate parts of world. It is also responsible for many deaths, mainly in children and pregnant women. It also creates a danger to travelers and immigrants; with import of disease in non-endemic areas.
Malaria is a mainly deadly blood disease caused by a parasite that is spread to human and animal hosts by the “Anopheles” mosquito. The human parasite, “Plasmodium falciparum”, is hazardous not only as it digests the red blood cells from hemoglobin, but it also changes the bonding properties of the cell it lives in. This alteration in turn causes the cell to fix to the walls of blood vessels. It becomes more dangerous when the contaminated blood cells block the capillaries in the brain, which causes blocking in blood circulation; this condition is known as cerebral malaria.
Infected female mosquito bite causes malaria in humans. The mosquito bite introduces young type of the malaria parasite into blood. The parasites move via bloodstream to the liver, where they develop to their second stage. In a week, the parasites depart the liver and go into the main bloodstream again. They attack the red blood cells and initiate to multiply rapidly. Parasites increases until the red blood cells explode, releasing lots of parasites into the bloodstream. Then parasites attack other red blood cells and the sequence of infection carry on, causing the general symptoms of malaria.
When a non-infected female mosquito bites an infected person, the mosquito immediately sucks up parasites from the blood and become infected with the malaria parasites. The parasites go through numerous phases of development in the mosquito. When the infected mosquito bites some healthy person, that person will become infected and the cycle will start again. Malaria parasites can also be spread by transfusion of blood from an infected person or by using infected needles or syringes.
|
