Central Nervous System Infections; Humans; Neuroimaging; Radiologists; antibiotic agent; dexamethasone; tuberculostatic agent; adult; aged; angiography; astrocytopathy; autoimmune disease; bacterial meningitis; bacterial zoonosis; brain tumor; case report; central nervous system infection; chikungunya; clinical article; clinical examination; computer assisted tomography; coronavirus disease 2019; dengue; drug megadose; drug response; encephalomyelitis; Enterovirus A71 infection; Enterovirus infection; epidemic; female; fever; fungal zoonosis; headache; hemiplegia; Hendra virus infection; histology; human; iatrogenic disease; influenza A (H1N1); Japanese encephalitis; male; measles; meningoencephalomyelitis; mental disease; Middle East respiratory syndrome; neurocysticercosis; Nipah virus infection; nuclear magnetic resonance imaging; parasitic zoonosis; radiologist; Review; Singaporean; surgical technique; tuberculosis; viral zoonosis; virus meningitis; West Nile fever; Zika fever; diagnostic imaging; procedures; Emerging infection; Epidemiology; Mimics; Multidisciplinary teams (MDT); Zoonotic outbreak