Matthew, Shegoi is said to be very effective for malaria. I'd also like to bring your attention to another native remedy for malaria that has been shown scientifically to be far more effective than quinine and other pharmacutical agents. It is artemisinin, an extract of the Chinese Wormwood plant. Dr. Henry Lai at the University of Washington has done extensive research on this substance. It is recognized in China and elsewhere as the treatment of choice for malaria. It is also very effective for most forms of cancer as it's molecule has an affinity for iron. When it comes in contact with iron it causes an immediate oxidation reaction destroying the cell, microbe etc. that contained the iron. Cancer cells as well as the malarial parasite contains high iron content. It can be taken in pill form although it is sold in bulk powder as well. Holly Pharma, Dr. Lai's company, has a web site you should visit.
Cheers.