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: transplant surgery history of present illness: the patient is a 50 year-old vietnamese speaking gentleman status post liver transplant on for hepatitis c and hepatocellular carcinoma who was discharged on after endoscopic retrograde cholangiopancreatography, common bile duct dilatation on discharge the patient was feeling fine. he was afebrile. vital signs were stable. his hematocrit was 89.1. prior to discharge the patient had once slightly blackened stool, which was attributed to slight bleeding after his endoscopic retrograde cholangiopancreatography. the patient returned on after passing two large melanotic stools and feeling much weaker then usual. the patient at that time denied any any other complaints. past medical history: 1. hepatitis c. 2. hepatocellular carcinoma. 3. post necrotic stenosis. 4. acute rejection. 5. common bile duct stricture status post stenting and sphincterotomy. past surgical history: status post liver transplant . medications on admission: 1. bactrim double strength one tab po q day. 2. calcium carbonate 500 mg po b.i.d. 3. colace 100 mg po b.i.d. 4. fluconazole 400 mg po q day. 5. protonix 40 mg po q day. 6. valcyte 450 mg po b.i.d. 7. prednisone taper currently 20 mg po b.i.d. 8. cellcept mg po b.i.d. 9. neural 150 mg po b.i.d. 10. levofloxacin 500 mg po q day. physical examination: the patient is pleasant, cooperative, tired looking. his blood pressure is 90/52, heart rate 110 to 120. cardiovascular regular rate and rhythm. clear to auscultation bilaterally. abdomen soft, nontender, nondistended, wound clean, dry and intact. rectal examination guaiac positive. laboratories on admission: white blood cell count 18.6, hematocrit 26.3 (down from 39.1 the day before), platelets 224, sodium 133, potassium 5.5, chloride 99, co2 24, bun 58, creatinine 1.0, glucose 228, calcium 8.8, phosphorus 5.2, magnesium 1.6, ast 55, alt 34, alkaline phosphatase 219, total bilirubin 2.4, total protein 5.1, albumin 3.0, amylase 44, pt 13.1, ptt 29.7, inr 1.1. hospital course: the patient was admitted to the transplant service. he was emergently transfused 2 units of blood and placed in the surgical intensive care unit. gastroenterology consult was emergently called who felt that the bleeding might be from the sphincterotomy site. an esophagogastroduodenoscopy was performed in the cicu and found a significant amount of bleeding from the sphincterotomy site. an injection of epi was performed, which seemed to stop the bleeding. the esophagogastroduodenoscopy otherwise was unremarkable. overnight the patient spiked a fever to 102.7 and he needed another unit of packed red blood cells for a falling hematocrit. on hospital day number two the patient's heart rate is still in the low 100s. his blood pressure improved to have reached 125/60. he received 3 more units of packed red blood cells, because his hematocrit kept bouncing back. he was started on ampicillin, levofloxacin and flagyl for presumed infection from endoscopic retrograde cholangiopancreatography. his prednisone was switched to 25 mg po q day per prednisone taper. on hospital day number three the patient is afebrile and vital signs are stable. his heart rate is in the 80s. he received 1 more unit of blood overnight, because of fallen hematocrit and because his hematocrit was bouncing, otherwise his laboratories were unremarkable. his white blood cell count decreased to 11.3. the patient's gastric lavage showed small streaks of blood, otherwise unremarkable. he was continued on ampicillin, levofloxacin and flagyl. he was transferred to the floor. the patient's diet was advanced to regular, which he tolerated well. he is passing regular stools. he denies any complaints. on hospital day number four the patient is afebrile and vital signs are stable. his white blood cell count is 11. his hematocrit finally stabilized around 36. liver function tests was within normal limits. his alkaline phosphatase stabilized at 122. due to high cyclosporin level his neural dose was decreased to 125 a day. condition on discharge: stable. discharge status: the patient is discharged to home with vna for wound check and medication administration and supervision. follow up: the patient will come back to the clinic on wednesday for a follow up. medications on discharge: 1. bactrim double strength one tab po q day. 2. fluconazole 400 mg po q day. protonix 40 mg po q day. 3. colace 100 mg po q.d. 4. valcyte 450 mg po b.i.d. 5. vitamin d 400 units po q day. 6. calcium carbonate 500 mg po b.i.d. 7. levofloxacin 500 mg po q day for seven days. 8. prednisone 25 mg po q.d. (prednisone taper see attached sheet). 9. neural 125 mg po b.i.d. 10. cellcept mg po b.i.d. discharge diagnoses: 1. status post liver transplant. 2. hepatitis c. 3. hepatocellular carcinoma. 4. common bile duct stricture status post endoscopic retrograde cholangiopancreatography and stenting. 5. status post gastrointestinal bleed. 6. intervention induced anemia. 7. hypomagnesemia. , m.d.,ph.d. 02-366 dictated by: medquist36 procedure: other endoscopy of small intestine endoscopic control of gastric or duodenal bleeding diagnoses: other postoperative infection acute posthemorrhagic anemia hemorrhage complicating a procedure personal history of malignant neoplasm of liver liver replaced by transplant 

Answer: The patient is high likely exposed to