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: is a 23-year-old male patient with a known congenital bicuspid aortic valve. he underwent a balloon valvuloplasty at age 15 at . he has been followed by serial echocardiograms over the years and has been asymptomatic. he, however, presented to st. hospital in , , where he lives in complaining of a number of days of onset of fever, chills and arthralgias. he initially had withdrawn himself from iv narcotics and felt that his symptoms were secondary to opiate withdrawal. however, workup revealed that he had aortic valve endocarditis. the bacteria was methicillin sensitive staph aureus. he was treated at that time during his course with a six-week treatment course of intravenous nafcillin. during the time in the hospital, he had significant mental status changes. his head ct revealed multiple infarcts as well as hemorrhages. his abdominal cat scan also revealed splenic and renal infarcts. he completed his antibiotic course and was discharged from the hospital in mid . he was referred to the adult congenital heart service at for followup. he presented on , underwent complete evaluation. an echocardiogram at that time revealed two large abscesses adjacent to the sinuses of valsalva which communicated with the aorta and possibly into the left ventricle. he was then admitted to on , for an aortic valve and roof replacement due to abscess formation status post endocarditis. past medical history: congenital bicuspid aortic valve status post valvuloplasty at age 15. the patient has a history of iv drug abuse, apparently quit approximately two months prior to admission to the hospital. also, alcohol use which he ceased two months prior to admission and positive smoker. physical examination: on admission to the hospital, neurologically, he was alert and oriented, but did note some short-term memory loss. his lungs were clear to auscultation bilaterally. his cardiac examination is regular rate and rhythm with a grade 3/6 systolic ejection murmur. his abdomen was unremarkable. his extremities were warm without edema. his electrocardiogram revealed sinus tachycardia with no ischemic changes or conduction abnormalities. over the next few days, the patient was evaluated for concurrent symptoms. he had a neurology consultation and an mri of his head and was found to have a question of mycotic aneurysm. as a result of these findings, he was seen by the neurosurgery service and went to the neuro interventional suite where he underwent cerebral angiography which was normal. infectious disease service was also consulted to assist with medication management. it was their recommendation to continue with intravenous oxacillin throughout his hospital course preoperatively. the hepatobiliary surgery service was consulted due to hepatic pseudoaneurysm which were also noted on his abdominal ct scan. he was taken to the interventional radiology suite where he underwent successful pseudoaneurysm embolization by dr. . he tolerated this well without any post procedure complications. the patient underwent transesophageal echocardiogram on which revealed essentially the same pathology previously identified on his prior echocardiogram. the patient was seen also on by the addiction medicine service due to his iv drug use history. the patient was ultimately taken to the operating room on , where he underwent bentall procedure with a 27 mm homograft, a vsd closure, debridement of an aortic root abscess. postoperatively, he was on intravenous propofol drip for sedation and was transported to the cardiac surgery recovery unit in good condition. he was kept intubated over night and weaned from mechanical ventilation and extubated early on postoperative day one. pain service was consulted to assist with his postoperative pain management. he was transferred from the intensive care unit to the telemetry floor on postoperative day three. he had begun with physical therapy and progressed with ambulation. he had remained on intravenous antibiotics while we were awaiting the final operative cultures of the valve. he continued to progress from a physical therapy standpoint well. he remained hemodynamically stable on beta blockers and diuretics and progressed well from a pulmonary toilet standpoint. his chest tubes were discontinued on postoperative day two. he was ultimately weaned off all of his narcotics and pain adequately controlled with nonsteroidal anti-inflammatory drugs. he was continuing to be followed by the infectious disease staff. dr. saw the patient again yesterday, and it was his recommendation to place the patient on dicloxacillin orally for discharge and to continue that for at least a month until he follows up with dr. in the outpatient infectious disease clinic. the patient was also given influenza vaccine upon dr. recommendation. the patient has remained hemodynamically stable and is presently ready to be discharged home on postoperative day eight. condition today: neurologically, he is alert and oriented without any apparent neurologic deficit. his lungs are clear to auscultation bilaterally. his cardiac examination is regular rate and rhythm. his sternal incision is clean with no drainage and no erythema. his abdomen is soft, nontender and nondistended with positive bowel sounds. his extremities are warm with trace edema bilaterally. he is ambulating independently. discharge medications: 1. zantac 150 mg p.o. b.i.d. 2. aspirin enteric coated 81 mg p.o. once daily 3. vitamin c 500 mg p.o. b.i.d. 4. niferex 150 mg p.o. once daily 5. ibuprofen 600 mg p.o. q.6 hours p.r.n. pain. 6. bacitracin ointment topically q.i.d. as needed to his skin lesions. 7. atenolol 25 mg p.o. once daily. 8. dicloxacillin 500 mg p.o. q.6 hours. he is to continue taking the dicloxacillin until he sees dr. in followup at the infectious disease clinic. most recent laboratory values include potassium of 4.5, bun of 14, creatinine of 0.7. his most recent hematocrit was 28.2. discharge diagnoses: 1. congenital bicuspid aortic valve. 2. aortic valve endocarditis. 3. intravenous drug abuse. 4. multiple cerebellar infarcts. 5. splenic, hepatic and renal infarcts. the patient is to followup with the drug rehabilitation program called sparc program in his home town area. he has an appointment with that service on at 12:30 p.m. this is located at in , . phone number for this center is . the patient is also to followup with dr. from the infectious disease service in one month. he is to followup with dr. , cardiac surgeon, in one month. he is to followup with dr. in one month from the adult congenital heart service at . condition on discharge: good. , m.d. procedure: extracorporeal circulation auxiliary to open heart surgery diagnostic ultrasound of heart arteriography of cerebral arteries injection or infusion of other therapeutic or prophylactic substance open and other replacement of aortic valve with tissue graft resection of vessel with replacement, thoracic vessels arteriography of other intra-abdominal arteries other operations on vessels of heart operations on other structures adjacent to valves of heart diagnoses: tobacco use disorder thoracic aneurysm without mention of rupture opioid type dependence, continuous methicillin susceptible staphylococcus aureus in conditions classified elsewhere and of unspecified site personal history of other diseases of circulatory system acute and subacute bacterial endocarditis congenital insufficiency of aortic valve alcohol abuse, in remission acquired cardiac septal defect aneurysm of other visceral artery 

Answer: The patient is high likely exposed to