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: allergies: sulfa (sulfonamide antibiotics) attending: chief complaint: progressive bilateral leg weakness major surgical or invasive procedure: s/p l3-s1 lami/fusion with instrumentation history of present illness: 70 y.o m p/w progressive lower back pains/leg weakness. pt having difficulty walking. has transitioned from cane to walker over past week. mri noted for severe l3-l5 spinal stenosis. past medical history: hand tremors chronic neck pain diverticulosis s/p sigmoid colectomy urinary incontenence pshx: orif right leg orif left forearm sigmoid colectomy cataract social history: married, lives with wife, - tobacco, + etoh physical exam: exam: the patient sits upright, in fair spirits, and is alert and oriented x3. heart rate is 68 and regular in rhythm, the respiratory rate is 12 and is in good general health. pt presents using a cane with ambulation. the gait is left antalgic. head and neck: head and neck are well centered without misalignment and palpation results in mild pain at base of neck. rom is full without discomfort. the neck is stable and the muscle strength and tone are within normal limits. skin is intact. spine/pelvis: spine is straight without scoliosis. discomfort is increased with flexion and extension, and with palpation of the back. lower extremities: palpation does not result in any pain. rom of hips, knees, and ankles is full and painless. hip impingement signs are negative bilaterally; knee is stable to manipulation. lower extremity motor strength is at left /ta/q and 4+/5 and symmetric at ip, h, fhl, and gc. patellar and ankle jerks are 1+ and symmetric. skin is intact bilaterally. sensation is intact to light touch bilaterally in the upper and lower extremities. distal pulses are intact with good distal capillary refill. pertinent results: 05:10am blood wbc-7.9 rbc-3.72* hgb-11.8* hct-32.3* mcv-87 mch-31.6 mchc-36.4* rdw-13.3 plt ct-163 05:45am blood wbc-8.6 rbc-3.58* hgb-10.9* hct-31.8* mcv-89 mch-30.5 mchc-34.2 rdw-14.0 plt ct-142* 05:20am blood wbc-10.3 rbc-3.71* hgb-11.4* hct-32.6* mcv-88 mch-30.7 mchc-35.1* rdw-13.6 plt ct-177 brief hospital course: pt taken to or for l3-l5 lami/fusion with instrumentation. surgery went without incident. see op note for further details. epidural/hv/foley placed. kefzol for abx pod 1- epidural/pca with good pain control, avss, ao x 3, pt consult pod 2- epidural/pca/foley d/c'd, dressing changed. pt unable to stand without max assistance, rec screen for rehab. transitioned to po dilaudid with effect. pod 3- pt medically stable and ready for d/c. avss, ao x 3, medications on admission: advil, percocet discharge medications: 1. acetaminophen 325 mg tablet sig: two (2) tablet po q6h (every 6 hours) as needed for pain/fever. 2. bisacodyl 5 mg tablet, delayed release (e.c.) sig: two (2) tablet, delayed release (e.c.) po daily (daily) as needed for constipation. 3. docusate sodium 100 mg capsule sig: one (1) capsule po bid (2 times a day). 4. magnesium hydroxide 400 mg/5 ml suspension sig: thirty (30) ml po q6h (every 6 hours) as needed for constipation. 5. multivitamin tablet sig: one (1) tablet po daily (daily). 6. senna 8.6 mg tablet sig: one (1) tablet po bid (2 times a day) as needed for constipation. 7. hydromorphone 2 mg tablet sig: 1-2 tablets po q4h (every 4 hours) as needed for pain: monitor for sedation. hold for rr < 12. 8. pantoprazole 40 mg tablet, delayed release (e.c.) sig: one (1) tablet, delayed release (e.c.) po q24h (every 24 hours). discharge disposition: extended care facility: - discharge diagnosis: l3/4, l4/5 spinal stenosis discharge condition: mental status:clear and coherent level of consciousness:alert and interactive activity status:ambulatory - requires assistance or aid (walker or cane) discharge instructions: activity ast tolerated. no heavy lifting, bending, twisting. walker with ambulation. pain meds as prescribed. physical therapy: activity: out of bed w/ assist, activity as tolerated. walker with ambulation treatments frequency: site: lumbar spine type: surgical dressing: gauze - dry change dressing: qd comment: may leave open to air as of followup instructions: f/u with dr office in 2 weeks.call for an appt. md, procedure: lumbar and lumbosacral fusion of the anterior column, posterior technique excision of bone for graft, other bones fusion or refusion of 2-3 vertebrae diagnoses: atrial flutter spinal stenosis, lumbar region, without neurogenic claudication abnormal involuntary movements 

Answer: The patient is high likely exposed to