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: this is a 77 year old male with polycythemia and severe three vessel disease. he was admitted to the ccu on for unstable angina with pressor requirement from an outside hospital. he underwent emergent cardiac catheterization demonstrating severe coronary disease and a intra-aortic balloon pump was placed and a cardiac surgical consult was obtained. patient underwent cardiac bypass graft procedure on . the patient's immediate postoperative course was complicated by an acute bleeding episode at one of his anastomosis sites, requiring take back to the operating room on . the patient subsequently demonstrated a prolonged postoperative course in the cardiac surgery recovery unit, punctuated by refractory atrial fibrillation, requiring cardioversion on , as well as difficulties with effective ventilation and feeding. the patient subsequently underwent tracheostomy and percutaneous endoscopic gastrostomy placement on . patient deteriorated on with hypotension and oliguria, he was noted to develop an acute abdomen with evidence of pneumatosis coli and diffuse colonic thickening on ct images. the patient was subsequently returned to the operating room on for an exploratory laparotomy, which demonstrated diffusely infarcted colon, requiring a total abdominal colectomy, with end ileostomy and pouch, placement of a jejunostomy tube and a splenectomy. the patient was, thereafter, transferred to the general surgery service and admitted to the surgical intensive care unit, where he remained until his date of death. following the patient's colectomy, he persisted with gradual prgression of his multi-organ system failure, respiratory and renal failure, over the ensuing weeks. following extensive discussion with the patient's family, the patient was made dnr and subsequently expired from combined renal and respiratory failure at 9:45 p.m. on . official time of death was 9:45 p.m. official date of death was . immediate cause of death: multi-system organ failure. , m.d. dictated by: , md medquist36 d: 02:19 t: 04:06 job#: procedure: combined right and left heart cardiac catheterization coronary arteriography using two catheters (aorto)coronary bypass of two coronary arteries angiocardiography of left heart structures other enterostomy temporary ileostomy incision of mediastinum temporary tracheostomy implant of pulsation balloon total splenectomy anastomosis to anus injection or infusion of oxazolidinone class of antibiotics closure of gastrostomy diagnoses: other postoperative infection acute kidney failure, unspecified cardiac complications, not elsewhere classified atrial fibrillation hemorrhage complicating a procedure cardiogenic shock acute myocardial infarction of unspecified site, initial episode of care urinary complications, not elsewhere classified 

Answer: The patient is high likely exposed to