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: penicillins attending: addendum: given the slight trend upward in mr. white blood cell count, it was decided to add another week of po vancomycin for treatment of c. diff colitis. he was discharged to rehab on with a full seven-day course of vancomycin. discharge disposition: extended care facility: hospital - md procedure: venous catheterization, not elsewhere classified venous catheterization, not elsewhere classified venous catheterization, not elsewhere classified continuous invasive mechanical ventilation for 96 consecutive hours or more parenteral infusion of concentrated nutritional substances other revision of vascular procedure enteral infusion of concentrated nutritional substances percutaneous abdominal drainage injection or infusion of other therapeutic or prophylactic substance endoscopic excision or destruction of lesion or tissue of esophagus closure of skin and subcutaneous tissue of other sites transfusion of packed cells transfusion of other serum transfusion of platelets injection of anesthetic into spinal canal for analgesia intra-abdominal venous shunt infusion of vasopressor agent diagnoses: pneumonia, organism unspecified anemia, unspecified alcoholic cirrhosis of liver acute kidney failure, unspecified acquired coagulation factor deficiency unspecified septicemia severe sepsis portal hypertension alcohol abuse, unspecified open wound of scalp, without mention of complication hemorrhage complicating a procedure other shock without mention of trauma intestinal infection due to clostridium difficile esophageal varices in diseases classified elsewhere, with bleeding hyperosmolality and/or hypernatremia acute pancreatitis unspecified viral hepatitis c with hepatic coma 

Answer: The patient is high likely exposed to