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: an 82-year-old male with a past medial history significant for cad status post 4-vessel cabg in , question of sick-sinus syndrome, history of paf, not anticoagulated, question of renal insufficiency, who presented to the ed with 5 to 6 melenic stools. the patient was in his usual state of health until 6 days ago when he developed diarrhea. he underwent colonoscopy on days prior to admission as part of a work up for diarrhea. findings included a single sessile 2.5 cm polyp, 2 small 2 to 3 mm sessile benign appearing polyps and several small mild diverticula. he had been off aspirin therapy for colonoscopy and just restarted aspirin 3 days prior to admission. polypectomy was performed and the polyps were completely removed. path showed no invasive carcinoma and the procedure was performed without complication. diarrhea resolved several days prior to admission which the patient attributes to starting taking acidophilus. on the morning of admission the patient was in his usual state of health and had an outpatient abdominal ct scan at hospital to evaluate "kidney cysts" per his reports. he reports that after drinking po contrast he had an episode of bright red blood noted on the toilet tissue followed by 6 melenic bowel movements. he denies recent heartburn, abdominal pain, rectal pain, nausea, vomiting, chest pain, shortness of breath. no recent nsaid use. he reports brief episode of lightheadedness upon standing while in the emergency room. in the ed he had a temperature of 96.5, heart rate of 83, blood pressure 128/58, respiratory rate of 18 with an oxygen saturation of 100% on room air. orthostatics in the er showed lying heart rate of 56, bp of 119/60, and standing heart rate of 76 and blood pressure of 56/36 with lightheadedness on standing, however notably he later was able to stand and walk to te bathroom without any lightheadedness. he received protonix 40 mg iv x1, 1 liter of normal saline x1. ng lavage was performed yielding less than 10 cc of bright red blood. the patient refused rbc scan. while in the ed he reported 5 to 6 episodes of black stools with an episode of bright red blood per rectum in the er of 200 cc. given the question of gi bleed and severe orthostasis, he was admitted to the micu. gi was consulted and recommended bleeding scan if bleeding continues. past medical history: 1. history of gastritis, colitis diagnosed by egd and colonoscopy 20 years ago in but no recent heartburn. 2. history of syncope. negative ekg and holter in . negative holter in . thought to be vagal in origin. 3. history of paroxysmal atrial fibrillation postop ', again . originally treated with amiodarone, discharged from in on coumadin. echo showed no paf or flutter but did reveal underlying sinus bradycardia with intermittent pr prolongation, left atrial abnormality, no significant av block or prolonged pauses, moderate atrial ectopy, low grade ventricular ectopy. 4. question of sick sinus syndrome. autonomic testing , with evidence of parasympathetic nervous system dysfunction on valsalva and heart rate variability testing. possible junctional tachybradycardia, tachy- brady sick sinus. normal tilt table testing, so not indicative of orthostatic hypotension. 5. cad status post silent mi. cabg x4 in . no complications. percutaneous ptca. echo , ef of 50 to 55%. mild mitral regurgitation. 6. cervical spondylosis. mr cervical spine . 7. liver hemangioma, ultrasound and ct . 8. chronic renal insufficiency. baseline creatinine 1.2 to 1.5. small left kidney. history of nephrolithiasis since , last symptomatic stone . 9. hyperlipidemia. 10. glaucoma. left cataract surgery. 11. mri showing lacunar infarcts. 12. essential tremor. 13. prostate adenoma resection. 14. removal of toes on left foot from frost bite. home medications: 1. neurontin 300 mg po t.i.d. 2. aspirin 81 mg po once daily. 3. lipitor 10 mg po once daily. 4. atenolol 100 mg po once daily. 5. metamucil qid. 6. xalatan eye drops. 7. cosopt eye drops. allergies: novocain and sulfa causes rash. social history: the patient denies tobacco. he drinks socially. immigrant from . married and lives with wife in . formally a physics researcher. family history: mother died of coronary artery disease, father of , sister has asthma. physical examination: vital signs: temperature of 97.5, heart rate 67, blood pressure 124/71, respiratory rate 15, 97% on room air. general: awake, alert, and in no apparent distress lying comfortably in bed. does not appear pale. heent: normocephalic, atraumatic. oropharynx clear. mucous membranes moist. right eye surgical. neck supple. no masses. no thyromegaly. jvp about 5 cm. cv: regular and normal s1 and s2; holosystolic murmur at apex. pulmonary: clear to auscultation bilaterally. back: no cva tenderness. abdomen: hyperactive bowel sounds. nontender. nondistended. liver span 5 cm in the mid clavicular line. extremities: warm and well perfused. no clubbing, cyanosis or edema. radial pulse 1+, dp 1+. skin: normal turgor. no masses. neurologic: alert and oriented x3, nonfocal. laboratory data: notable for hematocrit of initially 48 and then on recheck 36 dropping to 33 in the emergency room. inr 1.4. chemistry is notable for creatinine of 1.0. iron indices show iron level of 141, ferritin of 41, tibc of 244. assessment: an 82-year-old male with a past medial history significant for cad status post 4-vessel cabg, question of sick-sinus syndrome, history of atrial fibrillation, not anticoagulated, syncope, cervical spondylosis, liver hemangioma, and chronic renal insufficiency who presents with lower gi bleed and orthostasis. problem: gi bleed. the patient was initially admitted to the icu. two large bore ivs were placed. the patient was placed on nothing by mouth. started on protonix 40 mg iv b.i.d. his aspirin and lopressor were held. serial hematocrits were obtained. vitamin k was given to reverse his slightly elevated inr. the patient was evaluated by gastroenterology and he had a colonoscopy. the patient had bicap of the polypectomy site. his hematocrit was stable after his colonoscopy. aspirin was held for 14 days post his colonoscopy. he was called back to the floor. his hematocrit remained stable 2 days after his procedure. condition on discharge: stable. hematocrit 34. discharge medications: the patient was discharged on: 1. lipitor 10 mg po once daily. 2. his eye drops. 3. his neurontin 300 mg po t.i.d. 4. protonix 40 mg po once daily. 5. aspirin was to be held for 14 days post discharge. plan: the patient will follow up with his primary care physician 1 week. , procedure: endoscopic destruction of other lesion or tissue of large intestine diagnoses: acute posthemorrhagic anemia atrial fibrillation coronary atherosclerosis of unspecified type of vessel, native or graft aortocoronary bypass status chronic kidney disease, unspecified other and unspecified hyperlipidemia hemorrhage complicating a procedure hypotension, unspecified hypovolemia syncope and collapse other toe(s) amputation status diverticulosis of colon (without mention of hemorrhage) 

Answer: The patient is high likely exposed to