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: the patient is a 62 year-old male with a history of rheumatic fever and chronic anemia/beta thalassemia. he also has severe left ventricular hypertrophy and query ihss. he was admitted with positive blood cultures several months back and diagnosed with subacute endocarditis involving both valves. he was treated with antibiotics and he was noted to have extreme mitral regurgitation at the time and mild aortic regurgitation. he had a repeat echocardiogram on , which showed severe 4+ mr and 3+ moderate to severe mr. was admitted for cardiac catheterization prior to cardiac surgery. past medical history: rheumatic fever, hypertension, severe left ventricular hypertrophy query ihss, chronic anemia/beta thallasemia with a history of transfusions, bence- proteinuria, splenomegaly with splenic infarct. allergies: no known drug allergies. medications prior to admission: altace 2.5 mg q day, niacin 500 mg q.d. physical examination: the patient underwent cardiac catheterization, showed clean coronaries on . an id consult was obtained prior to surgery. on the patient underwent an aortic and mitral valve replacement. he tolerated the procedure well and was extubated on the day of surgery. he was started on vancomycin and ceftriaxone per id. a hematology consult was obtained for his thalassemia. they did not see any need for epogen. he was ready for transfer to the regular floor on postoperative day two. he continued to do well on postoperative day two and had his chest tube discontinued on postoperative day two. in the early a.m. on postoperative day three he went into atrial fibrillation, but he converted back to normal sinus rhythm with intravenous lopressor. he was started on po amiodarone. he is now in stable condition. his vials have been discontinued on postoperative day three. he was ready for discharge on postoperative day four. medications on discharge: lasix 20 mg q.d. times one week, k-ciel 20 milliequivalents q.d. times one week, lopressor 25 mg b.i.d., colace 100 mg b.i.d., aspirin enteric coated 325 mg q.d., percocet one to two tablets q 4 to 6 hours prn, amiodarone 400 mg q.d. fop: follow up with his primary care physician doctor in two weeks and with dr. in four weeks. , m.d. dictated by: medquist36 procedure: extracorporeal circulation auxiliary to open heart surgery combined right and left heart cardiac catheterization coronary arteriography using two catheters diagnostic ultrasound of heart open and other replacement of aortic valve with tissue graft aortography pulmonary artery wedge monitoring open and other replacement of mitral valve with tissue graft other conversion of cardiac rhythm diagnoses: anemia of other chronic disease atrial fibrillation mitral valve insufficiency and aortic valve insufficiency rheumatic heart failure (congestive) acute and subacute bacterial endocarditis other vascular complications of medical care, not elsewhere classified phlebitis and thrombophlebitis of superficial veins of upper extremities 

Answer: The patient is high likely exposed to