Consider the following medical report that includes the patient's historical health records. Use it to predict the disease that the patient is high likely exposed to. 

 Medical Report: pt is 77 year old who was vacationing on with family when he experienced a seizure lasting 20min. it started with arm tremors which was his usual pattern of seizures in the past. he has not had a seizure for 3yrs but has been weaning down his dosage of keppra recently and is down to 250mg qd. he was intubated at the osh because of vomiting to protect his airway. pmh: left total knee replacement, turp last year, afib on coumadin 5mg, 6days/wk but he stopped taking the coumadin on sunday, not sure why. he had a recent uti treated with levaquin. allergies: oxycontin-confusion, lamictal-nausea and vomiting. he had an lp in the ed and mri brain before arriving in sicu. he received acyclovir,ceftriaxone,keppra in the ed. cvs: t=100.6-99.4 po. hr=76-82 afib with no ectopy. sbp=115-145. iv ns at 75ml/hr. iv versed drip at 6mg/hr for sedation. pulses are present. neuro: pt moves head, squeezes hands to commands,pupils=+. no seizure activity noted since arrival. resp: on vent: ac 12 tv 550 fio2 50% peep5, sats=99-100%, lung sounds clear, diminished at bases. gu: unable to pass foley catheter, condom cath on, 730ml total output. gi: npo, ogt clamped for meds. +bowel sounds, no stools. skin: skin integrity intact. no red areas noted. pain: no indication of pain noted. access: 1 #20 angio,2 #18 angio peripheral iv's. very difficult to draw labs. social: family with patient, spoke with sicu resident. plan: needs line for lab draws, wean to extubate, monitor for seizure activity, meds as ordered procedure: continuous invasive mechanical ventilation for less than 96 consecutive hours venous catheterization, not elsewhere classified spinal tap incision of lung diagnostic ultrasound of heart enteral infusion of concentrated nutritional substances arteriography of cerebral arteries arteriography of cerebral arteries magnetic resonance imaging of brain and brain stem replacement of (naso-)gastric or esophagostomy tube magnetic resonance imaging of other and unspecified sites diagnoses: pure hypercholesterolemia acute kidney failure with lesion of tubular necrosis urinary tract infection, site not specified unspecified essential hypertension gout, unspecified atrial fibrillation unspecified glaucoma hypertrophy (benign) of prostate with urinary obstruction and other lower urinary tract symptoms (luts) displacement of cervical intervertebral disc without myelopathy grand mal status long-term (current) use of anticoagulants osteoarthrosis, unspecified whether generalized or localized, site unspecified retention of urine, unspecified other encephalopathy cerebral embolism with cerebral infarction hyperosmolality and/or hypernatremia knee joint replacement hemiplegia, unspecified, affecting unspecified side 

Answer: The patient is high likely exposed to