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: patient recorded as having no known allergies to drugs attending: chief complaint: hematochezia major surgical or invasive procedure: 1) colonoscopy : multiple diverticulosis throughout colon (no bleeding at time of exam) 2) tagged red blood cell scan : brisk gi bleeding likely in region of descending/sigmoid junction 3) mesenteric angiogram : no evidence of active bleeding on sma and arteriograms history of present illness: cc:. hpi: mr. is a 70 y.o. m with hx of diverticulosis, remote prior ugib, htn, now presenting with brbpr. patient initially noticed small amounts of red blood in stool - occuring once daily during the last 2 weeks. on day of admission, he had a normal brown bm in the morning, followed by the passage of a large amount of dark red blood, which filled the surface of the toilet bowl. . he was admitted to the floor and subsequently had 8 more episodes of painless bloody bowel movements with bright red blood in bowl. no melena. he had a syncopal episode after large bm, witnessed by his wife - this happened when he sat in his chair and did not fall or hit his head. orthostatic vitals signs were normal, bp stable in low 100s, but normally 150s as home. he was subsequently transferred to the icu after he was noted to have large hct drop from 41 --> 36.6 past medical history: pmhx: -ugib in with micu admission- gastric ulcer cauterized-no further bleeding episodes -diverticulosis- seen on colonoscopies in and . -polyp removed (adenoma) -htn -nephrolithiasis -?early alzheimer's social history: retired programmer, works in real estate, lives at home with wife no tobacco; occasional etoh family history: mother with physical exam: 97.6 bp 107/75 hr 68 rr 18 97% ra pleasant, nad eomi, mmm rrr, normal s1 and s2 lungs clear bilaterally abd soft, nontender, bowel movements: dark red blood with clots neuro exam nonfocal no edema pertinent results: hct 41 ---> 36.6 on initial presentation colonoscopy findings: excavated lesions multiple diverticula were seen in the whole colon. diverticulosis appeared to be severe. impression: diverticulosis of the whole colon tagged rbc scan impression: brisk gi bleeding likely in region of descending/sigmoid junction. sma and arteriogram impression: no evidence of active bleeding on sma and arteriograms. brief hospital course: 70 yo man with remote hx ugib, known diverticulosis who presented with brbpr at home and proceeded to have multiple episodes in-house with significant hct drop 1) lower gi bleed secondary to diverticulosis several episodes brbpr () on admission to the floor, noted to have hct drop from 41 --> 36.6 as well as syncopal episode. he was thus transferred to the icu for close monitoring and blood transfusions. upon transfer to the icu, his brbpr initially resolved, though his hct continued to slowly drift down. ng lavage revealed only clear fluid that was heme-negative. he went for urgent colonoscopy by the gi service and would found to have extensive diverticulosis although no active bleeding was seen. he then had recurrent brbpr, prompting urgent tagged rbc scan which suggested bleeding in the sigmoid colon region. however, subsequent angiography of the sma and did not reveal an active bleeding vessel and thus no intervention was performed. he was also seen by the surgery consult team in case an urgent colectomy would be needed following the above procedures, his symptoms actually stabilized and he had no further episodes brbpr in-house. he received in total 2 units prbc this admission, and his hct has been stable in the 27-30 range for the last 4 days. his gi team recommends close monitoring for bloody stools, but he does not need specific follow-up in their clinic at this time. should he have recurrent bleeding, he should return to the hospital immediately. i have recommended close f/u with pcp . and have given him a prescription for a hct check this week in outpatient lab, with the result to be forwarded to his pcp. last hct was 27.4 on the day of discharge. i have not yet started fe supplements as he is to closely monitor his stools in the coming weeks. he is to hold his aspirin for now, pending further instructions from his pcp. he has been given specific instructions to return to the hospital for any recurrent signs of bleeding or lightheadedness. in case of recurrent lgib, he would need urgent gi and surgical evaluations again. pneumonia and flu vaccine were administered this admission. i have spoken to his pcp's weekend coverage (dr. ) and provided her with an update as well. medications on admission: home medications: asa 81mg sertraline 50mg po daily aricept 5mg po qhs allopurinol 100mg po daily zantac 150mg vit e mvi discharge medications: 1. pantoprazole 40 mg tablet, delayed release (e.c.) sig: one (1) tablet, delayed release (e.c.) po once a day. disp:*30 tablet, delayed release (e.c.)(s)* refills:*2* 2. outpatient lab work please draw cbc and forward results to dr. ( (please note this is a phone number. i am unable to obtain fax number due to weekend) 3. aricept 5 mg tablet sig: one (1) tablet po once a day. 4. sertraline 50 mg tablet sig: one (1) tablet po once a day. discharge disposition: home discharge diagnosis: lower gi bleed, likely secondary to diverticulosis diverticulosis hypotension secondary to gi bleed, resolved acute blood loss anemia, now stable discharge condition: stable discharge instructions: please monitor your stools for any recurrent bleeding or darkening of stools (black). if you have any signs of bloody stools or develop lightheadedness, please contact your physician and return to the hospital. please have your blood drawn sometime this week at your pcp's office (bring the lab prescription we have provided). your last hematocrit level on was 27.4. also recommend seeing your pcp sometime in the next 1-2 weeks. we have held your blood pressure medications for now. please do not take aspirin or ibuprofen for now. you can discuss with at your pcp visit when you can resume these medications. please bring this paperwork for him. followup instructions: please call your pcp . on monday ( and schedule a follow-up for the next 1-2 weeks. please have your bloodwork drawn this week as well. dermatology at : provider: , rn,ms,: date/time: 1:30 md procedure: colonoscopy arteriography of other intra-abdominal arteries transfusion of packed cells diagnoses: acute posthemorrhagic anemia hypertensive chronic kidney disease, unspecified, with chronic kidney disease stage i through stage iv, or unspecified chronic kidney disease, stage iii (moderate) syncope and collapse diverticulosis of colon with hemorrhage 

Answer: The patient is high likely exposed to