7ys. old male child cooplained of faigue, severe headache , then had fever, and diarhea lasted for 3 days , fever subsided down , but the child had face muscles twitches on one side , weakness in the muscles of the arm and hand on the same side, his stool exam revealed yeast cells+++, occasional RBCs, undigested cells his blood exam. for Ca, Na, Mg was normal ,MRI was normal , now his concentration, and memory are affected to the extent that he forget his school friends what is your explanation of this case