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 59 year old male with a past medical history of recent streptococcal bacteremia currently on penicillin g, atrial valve replacement secondary to bicuspid valve and aortic stenosis. the patient was recently admitted on with fever and back pain and was found to have at that time a hemolytic streptococcus bacteremia. initially, the patient was treated with vancomycin but changed to penicillin g once the sensitivities were done. a transesophageal echocardiogram then was performed which was negative for endocarditis. a mra prior to discharge showed increased ........ of single and rector spinal muscles at t3-4 adjacent to facets and anterior within the right psoas. there was no discitis or abscess. thallium scan on corroborated the mra findings. the patient was discharged home on . since discharge, his pain has persisted and waxed and waned. he had one temperature of 100.0 f., accompanied by mild chills, but no higher temperatures or sweats. the patient denies nausea or vomiting; no urinary symptoms. mri done yesterday for re-evaluation since his pain was so severe, revealed an l2-3 discitis and osteomyelitis with extension into the psoas anteriorly as well as the rector spinal muscles posteriorly on the right. past medical history: 1. streptococcus bacteremia. 2. diabetes mellitus type 2 times 20 years. 3. aortic valve replacement; bicuspid valve and aortic stenosis on . 4. hypertension. 5. high cholesterol. 6. hemorrhoids. 7. right knee surgery but without any hardware. medications at home: 1. penicillin g 4 million units q. four hours. 2. avapro 75 mg q. day. 3. lantus 22 units q. a.m. 4. zestoretic 5/12.5. 5. celexa 20 mg q. day. 6. percocet q. four hours p.r.n. 7. atenolol 25 mg three times a day. 8. humalog sliding scale. 9. aspirin 325 mg q. day. 10. lipitor 20 mg q. day. 11. colace 100 mg twice a day. 12. valium 10 mg. allergies: no known drug allergies. social history: no tobacco, no ethanol. family history: father died of a heart attack at 76 years old and had prostate cancer. mother died of lung cancer in her 70s. there is a positive family history of diabetes mellitus. physical examination: temperature 97.6 f.; heart rate 62; blood pressure 164/79; 98% on room air. in general, the patient is not in acute distress, alert and oriented times three. heent: moist oral mucosa. neck with no jugular venous distention. cardiac: regular rate and rhythm, iii/vi systolic ejection murmur radiating to the carotid. lungs clear to auscultation bilaterally. abdomen with positive bowel sounds, soft, nontender. neurological: deferred as patient just had sedation prior to biopsy of his discs. laboratory: white blood cell count was 6.0, hematocrit 27.2, platelets 333. chem-7 was normal. the patient was admitted on initially to the medicine service. hospital course: upon admission, the patient received a disc biopsy in an attempt to identify the organisms responsible for the osteomyelitis. he was started on vancomycin and gentamicin as treatment. early in the patient's stay, he was found to have increasing anemia. his disc cultures came out negative although a set of blood cultures indicated gram positive cocci bacteremia. the infectious disease service was involved early on. they agreed with the antibiotic choice. they also requested that another transesophageal echocardiogram be performed to rule out endocarditis. on the 3rd, the patient developed atrial fibrillation. the electrophysiology team was involved, who also recommended a transesophageal echocardiogram to rule out abscess. the transesophageal echocardiogram was performed which was concerning for endocarditis. cardiology performed a transesophageal echocardiogram which did not show any obvious vegetations, but there was valve dehiscence and mitral regurgitation, which led them to believe that there probably biosynthetic aortic valve replacement endocarditis. the patient received one unit of packed red blood cells on the 5th. on , the patient was taken to the operating room by the neurosurgery team for bilateral l2, l3 diskectomy and right l3-l4 hemilaminectomy and medial facetectomy performed. the specimens were sent to microbiology. there was no obvious osteomyelitis per neurosurgery although there was muscle necrosis surrounding the facets. no gross pus was seen. a drain was left in for one to two days. on the 8th, the cardiothoracic surgery team was involved with the intention of doing a re-do aortic valve replacement. the ct surgery team was concerned about the patient's new onset atrial fibrillation and requested that the patient be ruled out for myocardial infarction which was done. amiodarone was started per electrophysiology and the patient was given increasing doses of lopressor. over the course of the next few days, the patient continued to require blood transfusions and manipulation of his blood pressure and heart rate control medications. over the next several days, the patient was continued on antibiotics although cultures from the operating room samples remained negative. over these days, his creatinine started to increase which was treated with intravenous fluids and close monitoring of the gentamicin levels. with the intention of taking the patient to the operating room for aortic valve replacement secondary to endocarditis a cardiac catheterization was performed to insure that there was not a need for coronary artery bypass graft during the same procedure. on the 13th, the patient was admitted to the coronary care unit for biventricular systolic hypertension requiring nitroprusside treatment. dictation ends. , m.d. procedure: venous catheterization, not elsewhere classified extracorporeal circulation auxiliary to open heart surgery combined right and left heart cardiac catheterization coronary arteriography using two catheters diagnostic ultrasound of heart hemodialysis venous catheterization for renal dialysis other exploration and decompression of spinal canal open and other replacement of aortic valve with tissue graft systemic arterial pressure monitoring pulmonary artery wedge monitoring excision of intervertebral disc biopsy of bone, other bones other myectomy diagnoses: acidosis acute kidney failure with lesion of tubular necrosis congestive heart failure, unspecified hyposmolality and/or hyponatremia hypertensive chronic kidney disease, unspecified, with chronic kidney disease stage v or end stage renal disease bacteremia acute and subacute bacterial endocarditis infection and inflammatory reaction due to cardiac device, implant, and graft 

Answer: The patient is high likely exposed to