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: this is a 54-year-old gentleman, with difficulty walking, first noting left leg weakness about 5 years ago. over the past several years, increased left leg weakness and difficulty lifting left leg up, has been dragging left leg for past year. he has been using cane for past 2 weeks. no bowel or bladder incontinence. ppd negative. biopsy reportedly negative. past medical history: negative. past surgical history: appendectomy. medications: propoxy-n/apap. allergies: no known drug allergies. social history: nonsmoker. works as a bus driver. physical exam: he is 5 feet 8 inches, 280 pounds. spastic gait, using cane. upper extremities: strength 5/5. ip: on the right 4, on the left 3 plus. hamstrings: on the right 5, on the left 4 plus. quads: on the right 5, on the left 5. dorsiflexion: on the right 5, on the left 4 plus. plantar flexion: on the right 5, on the left 5. plus 4 patellar reflexes. upper extremity hyperactive. eight beat clonus on the right. a sustained clonus on the left. mri shows t10-11 destructive process with paraspinal mass and irregular enhancement. there was positive cord compression at t10-11 with his pharynx extending to the c-spine. impression at the time was thoracic myelopathy. hospital course: the patient received a thoracic laminectomy and placement of syringopleural shunt. postoperative course was uncomplicated. physical therapy and occupational therapy were consulted. he was discharged to extended care facility for acute rehab. discharge instructions: keep the staples dry. call for fever or any signs of infection, redness, swelling or drainage from wound. please monitor for the following: fevers, chills, nausea, vomiting, inability to tolerate food or drink. if any of these occur, please contact your physician . final diagnoses: syringomyelia status post thoracic laminectomy and placement of syringopleural shunt. recommended follow-up: follow-up with dr. for staple removal 2 weeks postop, . call for an appointment at . major surgical or invasive procedure: thoracic laminectomy and placement of syringopleural shunt. discharge condition: neurologically stable. discharge medications: 1. percocet. 2. colace. , procedure: other shunt of spinal theca diagnoses: syringomyelia and syringobulbia 

Answer: The patient is high likely exposed to