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: service: general surgery history of present illness: the patient is a 51 year-old gentleman who presented to the emergency department complaining of a five day history of diffuse abdominal pain. he describes the pain as constant and cramping. it has worsened significantly over the last several days. he has continued to pass small amounts of flatus. his last bowel movement was two days prior to admission. past medical history: hepatitis c. he is a former alcohol abuser. former intravenous drug user. physical examination on admission: notable for significantly distended abdomen with tympany. he was tender to percussion guarding in the left lower quadrant and his rectal examination was guaiac positive without any masses. laboratory: white blood cell count 11.2, hematocrit 48.5, creatinine 1.2. he underwent a kub that represented multiple loops of distended small bowel, but no evidence of free air. an abdominal ct scan demonstrated distended small bowel loops and fat streaking and inflammatory changes around the sigmoid colon consistent with sigmoid diverticulitis. there was on evidence of extravasation of contrast but there was a small abscess present. hospital course: the patient was admitted and made npo and had an nasogastric tube placed. he was started on ampicillin, ceftriaxone and flagyl. his abscess was percutaneously drained on hd2. several days later he required a second drain to be placed to drain his pelvic collection. his ileus resolved slowly. he was maintained on tpn. a bowel preparation was performed and he was taken to the or for a sigmoid resection to definitely treat his sigmoid diverticulitis. on the patient underwent an uncomplicated sigmoid colectomy with primary anastomosis. one of the drains had perforated the small bowel in two separate portions of small bowel. small bowel resections were performed at these sites. his postoperative course was notable for several episodes of hypotension requiring normal saline fluid boluses and a short stay in the surgery intensive care unit. he was treated with zosyn and ciprofloxacin. on postoperative day two the patient was transferred to the floor and had a relatively benign postoperative course. he was kept on bowel rest and was restarted on total parenteral nutrition. on postop day six the patient's nasogastric tube, foley, jp drain and telemetry were all discontinued. the patient was transfused 2 units of packed red blood cells for a hematocrit of 23.3, which had been steadily declining over the proceeding several days. by postop day nine, however, the ileus had resolved and he began a slow advancement of his diet. he was able to tolerate this well and by postop day fourteen was eating a regular diet and his total parenteral nutrition was discontinued. physical therapy evaluated the patient and deemed him to be independent without any short term rehab needs. his pca was discontinued and he was initiated on oral pain medication on postop day ten. his antibiotics were discontinued on postop day six. the patient was discharged home in stable condition. medications on discharge: percocet one to two po q 4 to 6 hours prn pain, iron sulfate 325 mg po q day, lopressor 25 mg po b.i.d. , m.d. dictated by: medquist36 procedure: venous catheterization, not elsewhere classified parenteral infusion of concentrated nutritional substances other partial resection of small intestine percutaneous abdominal drainage open and other sigmoidectomy diagnoses: chronic hepatitis c without mention of hepatic coma acute posthemorrhagic anemia unspecified intestinal obstruction diverticulitis of colon (without mention of hemorrhage) abscess of intestine 

Answer: The patient is high likely exposed to