While, as melanization of P. yoeliioocysts develop further, both MPO and o-DPO activity of group I decreases,especially at 15 day, after infection of P yoelii.

• 但是随着约氏疟原虫卵囊黑化比率的增高，感染组血淋巴MPO和DPO活性逐渐下降，尤其以d_(15)最为明显。