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: decreased mental status hypoxia pancolitis portal venous gas major surgical or invasive procedure: none history of present illness: 80m transferred from nursing home with decreased mental status and hypoxia. intubated in the ed. ct abdomen showed extensive portal venous gas, with diffuse colonic wall thickening and pericolonic stranding consistent with pancolitis. past medical history: pmhx: 1. seizures as above. 2. unsteady gait with prior falls. 3. osteoporosis with fx in his hand and ankle 4. left fifth metacarpal fracture and right foot fracture. 5. learning disorder and possible obsessive compulsive disorder. 6. colonic polyps. 7. hearing loss. 8. enucleation of his left eye s/p assault in . social history: shx: lives in elder housing with sister in . 9th grade education, worked as maintenance worker at father's company. distant tobacco history. no etoh. family history: fhx: unavailable, sister on hd and with seizures/cns vasculitis. physical exam: admission physical exam 104.2 99 75 115/39 18 100% vent intubated no fc cv: rrr pulm: moves air bilaterally abd: soft, distended with some guarding rectal: heme (+) brief hospital course: was evaluated in the ed at on . he was intubated. ngt and central line were placed. wbc count was 21.3; hct 37.3; creatinine 1.5; lactate 4.6; lfts wnl. (+)uti. abdominal/pelvic ct scan showed extensive portal venous gas, with diffuse colonic wall thickening and pericolonic stranding consistent with pancolitis. he was admitted to the icu under the care of dr. . vanco/zosyn/flagyl were started. he responded to fluid resuscitation with improved urine output and stable vital signs. after a long discussion with the family it was decided that he would not receive surgical intervention, but would receive maximal medical therapy. at hd 1 wbc count was still elevated at 19; lactate 2.3. he was hemodynamically stable with uop wnl. he remained intubated/sedated. at hd 3 he was extubated. wbc count remained elevated at 24.9. acidosis was resolving. tpn was started. at hd 5 he was transferred to the floor. c. difficile was negative x 2. blood and urine cultures were negative from admission. at hd 7 he was afebrile and continued on iv abx. wbc count was 21.8. abdominal/pelvic ct scan showed portal vein thrombosis, slightly improved colonic thickening, and bilateral pleural effusions. anticoagulation was started. pt's clinical status remained stable. his wbc count remained elevated, although he remained a-febrile and was tolerating clear liquid diet. hd 10, his abdomen was noted to be more distended and a kub revealed a gastric dilatation. he was made npo and continued on tpn. on hd12, he was noted to have desaturation down to the 70%, hypotension, and questionable seizure activity. he was noted to be retaining co2 with a paco2 measured at 100. he was intubated and transferred to the icu. in the icu, he required aggressive fluid rescusitation, ventilatory support and occasional pressor support. he underwent bilateral thoracentesis in an effort to improve pulmonary status, but still remained vent dependent. maintainance of his blood pressure required aggressive fluid rescuscitation with pressor support. his kidney function declined as evidenced with a rising serum creatinine. the patient's lft's and coagulation profile also suggested liver decomponsation. a family meeting was held on hd 16 to discuss his clinical status and the fact that he was not improving, still requiring aggressive support, and the family reiterated their decision for him not to undergo any surgical intervention. it was decided that he would be supported until his sister could come to the hospital on hd 17 to say goodbye. his sputum cultures eventually grew klebsiella. the patient was made very comfortable, his ventilator support was withdrawn on the morning of hd 18, and he expired shortly thereafter. the family declined an autopsy for religious reasons. medications on admission: carbamazepine, lansoprazole, isosorbide, amlodipine, metoprolol, primodine discharge medications: none - expired discharge disposition: extended care discharge diagnosis: ischemic colitis, portal venous air, pneumonia discharge condition: expired procedure: continuous invasive mechanical ventilation for less than 96 consecutive hours venous catheterization, not elsewhere classified continuous invasive mechanical ventilation for 96 consecutive hours or more parenteral infusion of concentrated nutritional substances insertion of endotracheal tube insertion of endotracheal tube thoracentesis diagnoses: pneumonia, organism unspecified unspecified pleural effusion urinary tract infection, site not specified osteoporosis, unspecified epilepsy, unspecified, without mention of intractable epilepsy hypoxemia universal ulcerative (chronic) colitis 

Answer: The patient is high likely exposed to