Malaria is frequently complicated by jaundice, but in your case its also Hepatitis A
I hope you are sure its hepatitis A, and not simply malarial hepatitis.
He also has gram negative septicaemia
in his blood. Sepsis can also contribute to hepatitis.
His blood cultures will guide to the best antibiotic therapy. Provisionally ceftriaxone
How about his kidney functions and what are his liver function test reports?
Let us know his all investigations so that we can help you by adding more details to our answer.
Hope Your Child Gets well soon..