Q1: multiple intra-cellular thin ring-formed stage parasites without RBCs enlargement, likely severe P. falciparum malaria infection

Q2: Severe Plasmodium falciparum malarial infection with cerebral malaria (encephalopathy) as complications

Q3: Blood sequestration in cerebral veins causing sinus venous thrombosis

Q4: IV Artesunate + anticonvulsants +/- anticoagulants