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: history of present illness: mr. is a 64-year-old man with asymptomatic aortic stenosis times 15 years until when he developed acute worsening dyspnea on exertion associated with chest tightness also on exertion. cardiac catheterization revealed critical aortic stenosis and an aortic valve area of 0.5 cm squared, a gradient of 92 mm/hg with a cardiac index of 2.6 and an ejection fraction of 60%. he had angiographically normal coronary arteries. cardiac echocardiogram done , showed severe aortic valve stenosis, 1+ mitral regurgitation and mild pulmonary hypertension. past medical history: significant for: 1. diverticulitis. 2. inguinal hernia repair in . 3. hiatal hernia. 4. arthritis. 5. bph. 6. mild anemia. 7. helicobacter pylori. medications prior to admission: include: 1. protonix 40 mg q. day. 2. doxazosin 2 mg q. day. 3. vitamin b12 1000 mcg q. day. 4. aspirin 81 mg q. day. 5. multivitamin. 6. tylenol 500 mg eight tablets per day. 7. vioxx 25 mg q. day. allergies: he states no known drug allergies. social history: retired data processor. remote tobacco history. quit over ten years ago. rare alcohol use. he lives at home with his wife. physical examination on admission: vital signs: pulse 64, blood pressure 139/79 on the right and 128/73 on the left, respiratory rate 12. general: healthy-appearing man in no acute distress. skin: no rashes, heent: cranial nerves ii through xii grossly intact. normal sclerae. anicteric. the neck is supple with no lymphadenopathy. chest is clear to auscultation bilaterally. cardiac: 3-4/6 holosystolic ejection murmur. regular rate and rhythm. abdomen is soft, non-tender, non-distended with no hepatosplenomegaly. extremities: good peripheral pulses with no edema. no varicosities neurology is intact, nonfocal examination. laboratory data: white count 5.9, hematocrit 37.7, platelet count 173,000, inr 1.0. sodium 141, potassium 4.6, chloride 104, co2 30, bun 19, creatinine 1.0, glucose 87, alt 20, ast 28, 84, total cholesterol 184, psa 0.3. hospital course: on mr. was directly admitted to the operating room where he underwent an aortic valve replacement. please see the operating room report for full details. in summary, he had an aortic valve replacement with a 21 mm - bioprosthetic valve. his bypass time was 121 minutes with a crossclamp time of 103 minutes. he tolerated the operation well and was transferred from the operating room to the cardiothoracic intensive care unit. once in the cardiothoracic intensive care unit, the patient was hemodynamically stable. his anesthesia was reversed. he was weaned from the ventilator and successfully extubated. on the day of the surgery he remained stable throughout the evening and postoperative day one he was transferred to the floor for continuing postoperative care and cardiac rehabilitation. over the next two days with the assistance of the nursing staff and physical therapy the patient's activity level was increased. on postoperative day two his temporary pacing wires as well as his chest tubes were discontinued. on postoperative day three it was decided that the patient was stable and ready to be discharged to home. physical examination at discharge: vital signs: temperature 97.2, heart rate 78 sinus rhythm, blood pressure 113/65, respiratory rate 18, oxygen saturation 99% on two liters. weight preoperatively 77 kilograms, at discharge 78.8 kilograms. lab data: white count 10, hematocrit 25.4, platelet count 111,000. sodium 139, potassium 4.3, chloride 101, carbon dioxide 29, bun 27, creatinine 1.2, glucose 116. physical examination: alert and oriented times three. moves all extremities. follows commands. respiratory: clear to auscultation bilaterally. cardiac: regular rate and rhythm, s1, s2. 2/6 systolic ejection murmur. sternum is stable. incision with staples open to air. clean and dry. abdomen soft, non-tender, non-distended. normoactive bowel sounds. extremities are warm and well perfused with trace edema. discharge medications: include: 1. metoprolol 25 mg b.i.d. 2. furosemide 20 mg q. day times seven days. 3. potassium 20 meq q. day times seven days. 4. aspirin 325 q. day. 5. protonix 40 q. day. 6. doxazosin two q. hs. 7. multivitamin one q. day. 8. colace 100 b.i.d. 9. percocet 5/325 one to two tabs q. 6h. p.r.n. condition at discharge: good. discharge diagnoses: 1. aortic stenosis status post aortic valve replacement with a #21 - bioprosthetic valve. 2. arthritis. 3. bph. 4. mild anemia. 5. helicobacter pylori. 6. status post hernia repair. 7. diverticulitis. fop: the patient is to have follow up in the clinic in two weeks. follow up with dr. in four weeks and follow up with his primary care physician, . , in three to four weeks. , m.d. dictated by: medquist36 procedure: extracorporeal circulation auxiliary to open heart surgery open and other replacement of aortic valve with tissue graft diagnoses: anemia, unspecified aortic valve disorders diverticulitis of colon (without mention of hemorrhage) 

Answer: The patient is high likely exposed to