What are some of the symptoms of a brain abcess?

Fever, neural sympts. Beyond generalizable symptoms of infection ie. Fevers and signs like elevated white count, elevated platelets, CRP etc. Brain abscesses will also manifest with signs related to where they are - ie. Lesion's location will determine specific signs where they are affected and if the lesion is large enough and starts to exert pressure it can also cause headaches or meningeal signs like a stiff neck.