ABG, arterial blood gas; CBC count, complete blood cell count; cx, culture; CSF, cerebrospinal fluid; EBV, Epstein–Barr virus; BUN, blood urea nitrogen; CR, creatinine; Ca, calcium; PO4 , phosphate; Mg, magnesium; LFTs, liver function tests; TFTs, thyroid function tests; PT, prothrombin time; PTT, partial thromboplastin time; IFA, immunofluorescence assay; TB, tuberculosis; AP, anteroposterior; CT, computed tomography