A 15 year old girl is on high dose corticosteroids and immunosuppressives because of a renal transplant rejection. She presents with a 10 day history of fever, headache and confusion. Lumbar puncture reveals 25 lymphocytes per microlitre and a very high CSF protein. India ink stain is also positive. What's the most likely diagnosis?
选项：

A: Pneumococcal meningitis;
B:Cryptococcal meningitis;
C: Coxsackie meningitis;
D:Herpes simplex encephalitis;
E: Listeria meningitis