After infection with P. berghei NK65, the mRNA expression of anti-oxidative stress enzymes, such as glutaredoxin (Grx), γ-glutamil cysteine synthetase (γ-GCS), 2-Cys peroxiredoxin (2-Cys Prx) and thioredoxin reductase (TrxR), of the parasites was examined using real time quantitative PCR. This evidence concerns the gene GLRX and infection.