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: mr. is a 48 year- old gentleman with a past medical history significant for hypertension and alcohol abuse. he was admitted for gradually worsening posterior headache. he presented to an outside hospital emergency room and head ct did show blood in the basilar system suggestive of subarachnoid. the patient was transferred to emergency room. he did have some nausea and vomiting on transit. this was resolved by the time of arrival. he did also have systolic blood pressures into the 180s. otherwise the patient denied any visual changes or focal weakness or numbness. he did describe a pulsatile headache, which was worsened with head flexion. past medical history: hypertension and question of alcohol abuse, admits to 6 drinks per night. meds at home: question of hypertensive medications. allergies: no known drug allergies. social history: the above mentioned 6 drinks per night as well as a 20 pack year history of smoking, but he did quit 8 years ago. physical examination: vital signs are 131/66. heart rate 72. o2 sat was 98%. he was in no apparent distress and calm. head was normocephalic, atraumatic. neck was supple. heart showed regular rate and rhythm. chest was clear to auscultation bilaterally. extremities showed no clubbing, cyanosis or edema. neuro exam he was alert and oriented x 3. pupils are equal, round and reactive to light bilaterally. extraocular movements were full. cranial nerves ii through xii were grossly intact. strength was in all 4 extremities. deep tendon reflexes at the knees were 2+. he had a repeat cat scan upon admission to emergency department here, which did show subarachnoid hemorrhage. hospital course: he was admitted to the intensive care unit for close neurological monitoring. his blood pressure was kept less then 140. he was loaded with dilantin for seizure prophylaxis. he remained neurologically intact throughout the hospitalization. he did undergo an angiogram on . this was negative for aneurysm. he was also seen in consultation by neuro medicine. they recommended a repeat cerebral angiogram due to an infundibulum seen on the left ophthalmic artery on an mra. a repeat angiogram was performed on and was also negative for aneurysm. the patient was discharged to home on . final diagnoses: subarachnoid hemorrhage. recommended follow up was in 2 weeks with dr. . discharge condition: neurologically stable. discharge medications: dilantin 100 mg three times a day, metoprolol 25 mg twice per day, percocet 5/325 mg 1 to 2 tablets po every 4 to 6 hours prn pain and lorazepam 1 mg taper over 2 days. , procedure: arteriography of cerebral arteries diagnoses: unspecified essential hypertension subarachnoid hemorrhage personal history of tobacco use other and unspecified alcohol dependence, continuous 

Answer: The patient is high likely exposed to