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: patient is a 79-year-old gentlemen without significant past medical history who presents with bright red blood per rectum times two at home. he has noted that over the last few months he had some sciatica, which would sometimes cause him nausea and dry heaves. for this, he underwent an abdominal ct on to evaluate for possible small bowel obstruction or gastric outlet obstruction. the ct at that time showed diverticulosis without diverticulitis. the study was otherwise unremarkable. on the day of admission, the patient had two episodes of passing bright red blood per rectum enough to fill the bowl. he had an episode at 9 p.m. and 10 p.m. so he decided to come to the emergency department. he denied any chest pain, shortness of breath, nausea, vomiting associated with these episodes. past medical history: 1. benign prostatic hypertrophy. 2. status post a left total knee replacement. 3. status post right total hip replacement. 4. borderline type 2 diabetes mellitus. 5. first degree av block. medications: hytrin 5 mg po q.d. allergies: penicillin leads to a rash. family history: the patient denies any family history of gastrointestinal bleeding, irritable bowel disease, cancer or heart disease. social history: the patient is married. he lives at home with his wife. works part-time with troubled youth. he has a past cigarette/pipe smoking history, but quit over 30 years ago. he denies significant alcohol intake over the past 30 years and now currently states he is a social drinker. physical examination: upon admission, he was noted to be orthostatic. his supine blood pressure was 159/79 with a heart rate of 70, seated he was 139/63 with a heart rate of 96 and standing he was 127/70 with a heart rate of 113. his respiratory rate was 22. he was saturating 96% on room air. in general, he was comfortable in no acute distress. his head, eyes, ears, nose and throat exam was unremarkable with anicteric sclera, no conjunctival pallor. his pupils equal, round and reactive to light. his mucous membranes were moist. he had no oral lesions. his neck was supple without lymphadenopathy or jugular venous distention. his lungs were clear to auscultation bilaterally without wheezes, rhonchi or rales. his heart was mildly tachycardic, regular in rhythm with occasional premature ventricular contractions, normal s1, s2, no murmurs, rubs or gallops. his abdomen was soft, nontender, it was obese with normal active bowel sounds. no apparent hepatosplenomegaly, no rebound or guarding. he had trace to 1+ edema bilaterally in his lower extremities. pertinent laboratories: admission laboratories were significant for a white count of 8.6, hematocrit 40.3, platelets 195,000. sodium 135, potassium 4.2, chloride 102, bicarbonate 21, bun 17, creatinine 1.1, glucose 231. his pt was 13.5 with an inr of 1.2, ptt 27.9. lfts were: alt 20, ast 45, alkaline phosphatase 82, bilirubin 0.3. his urinalysis was negative. his electrocardiogram indicated normal sinus rhythm, axis of approximately 0 degrees with first degree av conduction delay and an occasional premature ventricular contraction. he had qs in iii and avf, as well as an inverted t in iii and biphasic ts in avf. compared with prior study of , there were no new changes. hospital course: he was admitted to the medical intensive care unit and proceeded to have three more episodes of bright red blood per rectum, passing copious amounts of red material. his hematocrit dropped from the admission hematocrit of 40.3 to a nadir of 27.2. colonoscopy was performed indicating diverticulosis of the sigmoid colon, descending colon, transverse colon, and ascending colon with a polyp in the colon. the mucosa was normal with no signs of ischemia or inflammation. there was no active bleeding noted. the patient was transfused three units of packed red blood cells and his hematocrit stabilized at approximately 33. the patient was observed for 24 hours and then was discharged to home in stable condition. discharge medications: 1. hytrin 5 mg po q.d. 2. protonix 40 mg po q.d. follow-up: the patient will follow-up with dr. on and with gastrointestinal with dr. on for further evaluation of his colon polyp. discharge diagnoses: 1. lower gastrointestinal bleed 2. diabetes mellitus type 2. 3. type 1 atrioventricular conduction delay. , m.d. dictated by: medquist36 d: 20:01 t: 20:01 job#: procedure: colonoscopy other irrigation of (naso-)gastric tube diagnoses: acute posthemorrhagic anemia diabetes mellitus without mention of complication, type ii or unspecified type, not stated as uncontrolled loss of weight benign neoplasm of colon knee joint replacement diverticulosis of colon with hemorrhage hip joint replacement orthostatic hypotension 

Answer: The patient is high likely exposed to