AKT-1499

A 30 year old man comes to the clinic complaining of anorexia, feverishness, and vertigo that have been going on for four days. He reports having difficulty balancing and staying upright when walking, as well as experiencing mild vertigo episodes lasting 10-20 minutes at a time. His hearing is unaffected. During the examination, some cervical lymphadenopathy is observed, but otherwise, there are no notable findings. What is the probable diagnosis?