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 79-year-old male with hypertension, prostate cancer (status post radiation therapy), status post coronary artery bypass graft times four in following a positive exercise tolerance test and a catheterization which showed a 90% left main and 3-vessel disease. during his hospitalization for his coronary artery bypass graft, the patient developed new atrial fibrillation and aspiration pneumonia, a left pleural effusion, and he also received a right iliac stent during his catheterization. he was discharged to rehabilitation and then to home. on , the patient's visiting nurse noted that the patient had a melanic stool. the patient was then admitted to hospital where he was noted to have an infected sternal wound. he was then transferred to for further care. past medical history: 1. hypertension. 2. hypercholesterolemia. 3. non-insulin-dependent diabetes mellitus. 4. prostate cancer, status post radiation therapy in . 5. glaucoma. 6. right inguinal hernia repair. 7. atrial fibrillation (new onset in ). 8. colon polyps. 9. carotid stenosis. 10. history of transient ischemic attack. 11. coronary artery bypass graft times four. 12. peripheral vascular disease, status post stent to the iliac artery in . medications on admission: medications on admission included multivitamin, lopressor 50 mg p.o. b.i.d., aspirin 81 mg p.o. q.d., ambien, humulin, captopril, amiodarone, pravachol, cosopt, alphagan, iron sulfate, coumadin (held), protonix. allergies: no known drug allergies. social history: the patient lives with his wife at home with . physical examination on presentation: temperature of 99.9, pulse of 100, blood pressure of 162/62, oxygen saturation of 97% on 2 liters. in general, the patient was in no acute distress. his head, eyes, ears, nose, and throat were unremarkable. he had no icterus. his neck was supple with jugular venous distention. he did have bilateral carotid bruits. his lungs were clear bilaterally. his heart was regular in rate and rhythm without murmur, rubs or gallops. his abdomen was soft, nontender, and nondistended, with good bowel sounds. his extremities had no edema. his right foot had a healing ulcer on the bottom of his heel and over the lateral malleolus. his sternum incision showed erythema and purulent and sanguinous fluid staining the dressing with a small opening at the inferior portion of the incision. the sternum was not stable. the rectal examination was guaiac-positive. pertinent laboratory data on presentation: laboratories from outside hospital revealed a white blood cell count of 17.4, hematocrit of 32.8, platelets of 368 (85% polys, 6% lymphocytes, 9% monocytes). sodium of 138, potassium of 4.1, chloride of 96, bicarbonate of 28, blood urea nitrogen of 26, creatinine of 0.9, glucose of 385. inr of 7.4. urinalysis was unremarkable. hospital course: the patient was initially admitted the surgical service. on , the patient underwent debridement and partial resection of his sternum. the sternum wires were removed. there was evidence of sternal dehiscence. or cultures and blood cultures grew out methicillin-resistant staphylococcus aureus, and the patient was placed on vancomycin. he underwent an omental flap on . this procedure was delayed secondary to sepsis and hypotension requiring pressors. the patient was temporarily paralyzed and intubated. following the flap reconstruction, the patient remained intubated and developed a ventilatory-requiring pneumonia. a bronchoscopy on revealed a pseudomass infection which was resistant to ceftazidime and imipenem but sensitive to cefepime. in terms of his gastrointestinal bleeding, an upper endoscopy was performed on which showed normal mucosa to the duodenum. the patient continued to have gastrointestinal bleeding, however, and on underwent a colonoscopy showing angiectasia of the rectum and radiation proctitis; however, this was not actively bleeding. other events of significance during his hospitalization included direct current cardioversion on for atrial flutter. the patient also had episodes of gross hematuria. urology was consulted and recommended outpatient followup. the patient also developed a clot in the right internal jugular that was identified by doppler. the patient also developed bilateral pleural effusions. the patient also developed a splenic infarct while on pressors. on , the patient was transferred from the surgical service to the medical intensive care unit. it was felt that his surgical issues had resolved. however, the patient had multiple medical problems at that time including failure to wean from the ventilator, ongoing pneumonia, and pleural effusions. as far as his cardiac status at that time, he was noted to be in some congestive heart failure secondary to diastolic function. he was placed on captopril at that time. as far as his renal function, he had developed acute tubular necrosis in the setting of hypotension from sepsis, and this was slowly resolving. he was grossly fluid overloaded, however. in terms of his neurologic status, he had generalizes weakness and also had profound mental status changes. he was alert but not responsive and would not follow commands. in terms of his gastrointestinal status, the patient was on protonix for his history of upper gastrointestinal bleed. his hematocrit was stable at the time of his transfer to the medical intensive care unit. as far as his hematuria, he continued to have intermittent hematuria attributed to foley trauma. the remainder of the hospital course was significant for his failure to wean off the ventilator and for his change in mental status. as far as his failure to wean, he was repeatedly attempted to wean. despite adequate treatment of his pneumonia, the patient would become extremely agitated and tachypneic on trials of pressor support. as far as his cardiac function, a repeat echocardiogram showed moderately depressed systolic function, and the patient was continued on amiodarone, lopressor, and an ace inhibitor. the patient was evaluated by the neurology service who felt that his delta mental status was most likely multifactorial in the setting of his medical problems. magnetic resonance imaging of the head showed no acute stroke or bleed but had an old left cerebellar stroke and mild atrophy with diffuse microvasculature ischemic changes and bilateral mastoid air cell disease. as the patient's condition did not improve despite aggressive treatment, and given his multiple medical problems and his overall poor prognosis, after an extensive discussion with the patient's wife and her nieces, it was decided to withdraw aggressive care and make the patient comfort measures only. in this setting, the patient expired secondary to respiratory failure and cardiac asystole on at 5:43 p.m. diagnoses at death: 1. status post sternal debridement. 2. status post omental flap reconstruction of the sternum. 3. congestive heart failure. 4. ventilator-requiring pneumonia. 5. respiratory failure. 6. acute tubular necrosis. 7. acute renal failure. 8. insulin-dependent diabetes. 9. change in mental status. 10. upper gastrointestinal bleed. 11. radiation proctitis. , m.d. dictated by: medquist36 procedure: continuous invasive mechanical ventilation for 96 consecutive hours or more parenteral infusion of concentrated nutritional substances insertion of endotracheal tube temporary tracheostomy local excision of lesion or tissue of bone, scapula, clavicle, and thorax [ribs and sternum] local excision of lesion or tissue of bone, scapula, clavicle, and thorax [ribs and sternum] graft of muscle or fascia attachment of pedicle or flap graft to other sites other partial ostectomy, scapula, clavicle, and thorax [ribs and sternum] diagnoses: acute kidney failure with lesion of tubular necrosis unspecified osteomyelitis, other specified sites blood in stool surgical operation with implant of artificial internal device causing abnormal patient reaction, or later complication,without mention of misadventure at time of operation infection and inflammatory reaction due to other vascular device, implant, and graft infection and inflammatory reaction due to other internal orthopedic device, implant, and graft other staphylococcal septicemia 

Answer: The patient is high likely exposed to