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: mr. past medical history was significant for diverticulosis with recurrent lower gi bleeding for which he was treated with a right hemicolectomy in at an outside hospital. past medical history also was significant for hypertension, glaucoma, rheumatic heart disease and hemorrhoids. home medications: 1. hydrochlorothiazide. 2. zestril. 3. timolol for his glaucoma. 4. proton pump inhibitor, protonix. allergies: mr. had no known drug allergies. mr. postoperative course was largely uneventful and characterized by a slow, but steady recovery from his surgery. he followed a conservative postoperative regimen, which included post-surgical bowel rest, routine labs, and chemistries. on postoperative day #4, a series of lasix doses were started in an attempt to gently diurese the fluid that mr. had received during his surgery. this was intended to augment the normal diuresis of third space fluid following his surgery. as mr. abdomen remained distended, through postoperative day #7, he was started on total parenteral nutrition on that day and this continued until he was taking adequate nutrition po. on postoperative day #9, mr. was started on a diet of clear liquids, which he tolerated fairly well. but, he continued to have mild to moderate abdominal distention with minimal tenderness. he was continued on a regimen of iv and then po lasix to continue his diuresis of fluids and the abdominal examination was followed serially until it was felt that he was tolerating the clear diet well and solid foods could be reintroduced. on postoperative day #11, as mr. was being screened for discharge from the , it was noted that he continued to have an oxygen requirement, which he did not have prior to his admission to the hospital. portable chest x-ray taken at that time showed no pneumonia, but some suggestion of pulmonary edema. more vigorous diuresis using lasix (furosemide) was started and by postoperative day #12, mr. room air oxygen saturation was 98%. he was discharged on postoperative day #12. at the time of discharge, mr. condition was good. discharge diagnoses: lower gi bleed/bleeding diverticula. , m.d. dictated by: medquist36 procedure: parenteral infusion of concentrated nutritional substances other and unspecified partial excision of large intestine arteriography of other intra-abdominal arteries other small-to-large intestinal anastomosis diagnoses: unspecified essential hypertension acute posthemorrhagic anemia diverticulosis of colon with hemorrhage rheumatic heart disease, unspecified 

Answer: The patient is high likely exposed to