|
Malaria
is caused by a parasite that gets into the
red blood cells and multiplies, causing
the cells to rupture and the body to respond
with a fever. For an antimalarial to work,
it must intercept the parasite's life cycle
by reaching the parasite in the patient's
blood. The drug has to build up in the patient's
blood until it has killed all the trouble-causing
parasites.
By
the spring of 1943, doctors at Goldwater
had presented the army with new dosage rules
for Atabrine, which had already been used
in the place of quinine but with previously
poor results. They also developed new drugs
such as Chloroquine. Used for several decades,
Chloroquine has been largely replaced by
new drug compounds because the malarial
parasites in regions such as Southeast Asia,
portions of South America, and much of Africa
became resistant to the drug. Organizations
such as Roll Back Malaria and the Medicines
for Malaria Venture, co-sponsored by several
public and private international groups,
fund research into new drugs for especially
resistant areas.
|
 |


Click
on the image above to see the life cycle of
the malaria parasite in the human body
(Image
courtesy of the Medical Arts and Photography
Branch, NIH) |