Final answer:
The additional treatment that should be ordered for the patient is intravenous immunoglobulin (IVIG) therapy, which can help correct immune-mediated complications. Aggressive volume replacement and filgrastim are important in the management of the patient's symptoms and underlying condition.
Step-by-step explanation:
The additional treatment that should be ordered for the patient is intravenous immunoglobulin (IVIG) therapy. In the case described, the patient presents with a sore throat, fever, and painful aphthous ulcers in her mouth. The low white blood cell count and proteinuria suggest a possible viral infection such as viral pharyngitis with associated immune-mediated complications like immune thrombocytopenic purpura (ITP).
Intravenous immunoglobulin (IVIG) therapy involves infusion of a solution containing antibodies derived from pooled human plasma. IVIG therapy can help correct immune-mediated complications by providing a temporary boost to the immune system. It is often used in the management of various autoimmune and immune-mediated conditions such as ITP.
Aggressive volume replacement and filgrastim are important in the management of the patient's symptoms and underlying condition but IVIG therapy specifically targets the immune-mediated complications that the patient is experiencing.