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: allergies: patient recorded as having no known allergies to drugs attending: chief complaint: headache major surgical or invasive procedure: suboccipital decompressive craniotomy, c1 laminectomy, duraplasty history of present illness: the patient is a 42-year-old patient who is well known to the neurosurgical service. he has been seen in dr. office multiple times on an outpatient basis. he has been diagnosed with a chiari ii malformation in the setting of a previously operated spinal meningeal viral series. the patient has classic signs of headaches that are positional and aggravated by coughing. the patient has been worked up with an mri scan that shows the tight posterior fossa with inferior displacement of parts of the cerebellum to the level of c1. he was counseled. he wished to proceed with elective decompression today. the patient was consented in the office. he was taken to the operating room on the evening of . past medical history: past medical history: 1. anxiety/depression. 2. chiari ii malformation with hydrocephalus. family history: not obtained physical exam: general: mildly anxious man but well appearing. neurologic exam: mental status: patient is alert, awake, mildly anxious affect with some tangential speech. good attention, tells a coherent story. language is fluent with good comprehension, repetition, able to read. he naming intact. no dysarthria. no neglect or left/right mismatch. cranial nerves:i-xii-intact. sensory: normal touch, vibration, proprioception, pinprick sensation. motor: slightly increased tone in the legs. no pronator drift. mild postural tremor, fine, low amplitude with arms outstretched. full strength. reflexes: brisk throughout 3+ with crossed adductors and bilaterally upgoing toes. + bilaterally. coordination: finger-to-nose slowwer on l, but normal heel to shin, rapid alternating movements. gait:gait appears normal but unable to tandem. brief hospital course: pt was admitted and brought to the or electively on for decompressive suboccipital craniotomy and c1 laminectomy and duraplasty under general anesthesia. post op he was transferred to sicu for close neurological monitoring. he remained neurologically intact. he was intermittently bradycardic. post op head ct showed good appearance. he was transferred to the floor. his diet and activity were advanced. his dressing was clean and dry. medications on admission: lithium bicarbonate (generic) 300/150/300, cymbalta 60mg daily. discharge disposition: home discharge diagnosis: chiari malformation discharge condition: neurologically stable discharge instructions: keep incision dry. call for fever or any signs of infection -redness, swelling or drainage from wound. followup instructions: follow up with dr. for suture removal in 10 days - call - for appt. procedure: other repair of cerebral meninges other craniotomy diagnoses: hyposmolality and/or hyponatremia dysthymic disorder other specified surgical operations and procedures causing abnormal patient reaction, or later complication, without mention of misadventure at time of operation spina bifida with hydrocephalus, cervical region superficial injury of cornea other symptoms referable to back 

Answer: The patient is high likely exposed to