G6PD-deficient patients are resistant to Plasmodium falciparum malaria
- because their red blood cells (RBCs) have reduced levels of NADPH , leading to oxidative stress.
- Due to oxidative stress , structure of RBC weakens,causing their premature destruction (hemolysis)
- so that the parasite can’t complete its life cycle.
- This natural selection advantage explains the higher prevalence of G6PD deficiency in malaria-endemic regions.
OR
- Decreased activity of G6PD impairs Hexose Monophosphate[HMP)Shunt. Thus there is no synthesis of NADPH as well as no formation of reduce glutathione in RBC for protecting it from stress.
- Malaraial parasites require NADPH for its optimal growth.
- Hence, parasite survival is reduced against severe falciparum malaria infected RBCs.

