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Parasites' Struggle for Survival Makes Malaria Deadly

by Sheela Philomena on February 16, 2011 at 10:25 AM
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 Parasites' Struggle for Survival Makes Malaria Deadly

Malaria is deadly because the parasites that cause the disease battle other infections for long term survival, claimed scientists.

Edinburgh University scientists found, when malaria parasites enter the bloodstream, they alter their plan of attack if they face competition from other strains of the infection.

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However, it means they have less resources left to spread the disease.

The scientists found the malaria parasites focus on producing cells that replicate quickly to cause infection, rather than cells capable of being taken up by a feeding mosquito and spreading the disease.
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Since malaria infections usually consist of multiple, competing strains of the parasite, this attack strategy is the best way to beat the competition, the scientists said.

However, it means the parasites pay a high price, as they therefore have fewer resources left to spread the disease.

"We found that when parasites compete with each other, they respond with a sophisticated strategy to safeguard their long-term survival," the BBC quoted Laura Pollitt of Edinburgh University's school of biological sciences, as saying.

"They opt to fight it out in the bloodstream rather than risk everything on the chance of infecting mosquitoes in the short term," Pollitt added.

The research has been published in the American Naturalist.

Source: ANI
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