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 51 year old gentleman with a two month history of headache worsening over the last week with minor word finding difficulties. the patient is a right-handed gentleman with a long-standing history of crohn's disease on maintenance doses of asacol who presents with a two month history of chronic low grade dull global headache and approximately one week of progressive intense headache with one week of vague mental status changes and occasional word finding difficulties. past medical history: 1. as above, crohn's disease. 2. history of depression. past surgical history: 1. colectomy with distal ileotomy for crohn's disease in with no sequelae. medications: 1. celexa. 2. asacol. allergies: the patient has no known allergies. physical examination: on physical examination, the patient was afebrile, 96.9 f.; 126/76; 64 is heart rate; 20 is his respiratory rate; 95% on room air. neurologically: pupils equally round and reactive to light. extraocular muscles are full. visual fields full to confrontation. smile is symmetric. neck supple. chest clear to auscultation. cardiac is normal sinus rhythm with no murmurs, rubs or gallops. abdomen soft, positive bowel sounds in all four quadrants, nontender. extremities with no cyanosis, clubbing or edema. neurologically, mentation is slightly slow, perseverative with minor word finding inconsistencies. calculations: simple addition okay but poor with subtraction. objects: naming three out of three within normal limits. pupils 2.5 down to 1.5, briskly reactive. extraocular muscles are full with no nystagmus. visual fields within normal limits to gross examination. strength: he has mild right upper extremity four plus out of five paresis all major muscle groups compared to the left. sensation is intact to light touch throughout. deep tendon reflexes are two plus in the upper extremities and one plus at the ankles. no clonus. positive mild right drift with no ataxia. laboratory: on admission, white blood cell count 7.1, hematocrit 39.2, platelets 101, inr 1.2, pt 12.9, ptt 25, 139/3/5, 102/28; 11/1.0; 96. ct scan shows a large left frontal parietal subacute subdural hematoma with shift and compression of the left lateral ventricle system. the subdural has membranes present. hospital course: the patient had bedside drainage of the subdural hematoma in the surgical intensive care unit by dr. . the procedure was tolerated well. the patient remained flat on bed rest. the patient had a repeat head ct scan on , which showed good evacuation of subdural hematoma. the drain was discontinued and the patient was transferred to the regular floor where he remained neurologically stable. he was discharged on , in stable condition with stable vital signs, awake, alert, oriented. no drift. discharge instructions: 1. the patient will follow-up with dr. in two weeks time with repeat head ct scan , at 12 p.m. discharge medications: 1. percocet one to two tablets p.o. q. four hours p.r.n. 2. celexa. 3. asacol. condition at discharge: the patient was in stable condition at the time of discharge. , m.d. dictated by: medquist36 procedure: other cranial puncture diagnoses: depressive disorder, not elsewhere classified subdural hemorrhage regional enteritis of large intestine 

Answer: The patient is high likely exposed to