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: code: full allergies: nkda pt is an 83 year old woman with history of chf, htn, cad, severe as who presented to ed from home with increased sob, per home health aide pt had abdominal pain and sob. had appt with pcp yesterday and referred pt to ed for hct drop (29->24.9) and elevated wbc (9.8->21.9). in ed ng lavage negative, however guiac positive. found to have k 6.0 received kayexelate and calcium gluconate. transferred to micu for ? gi bleed and ms changes. neuro: pt a&o x 2 (baseline), mostly unsure of year. mae, able to follow commands, assist with turns, confused/anxious at times easily reoriented. pt denies pain. cv: hr nsr 60-80 with rare ectopy, nbp 110-130/40-50. am hct 24.3 being checked q8h, next due around 0800. received 1 unit prbc, infused over 6 hours due to pt's severe as. will discuss with team regarding additional infusion. piv x 2. peripheral pulses palpable. resp: rr teens to 20s with sats >94% on 2l nc. lung sounds clear in all fields. pt's cough/gag intact. gi: bs x 4, pt with 2 large diarrhea stools last night (received kayexelate in ed), guiac positive. cdiff specimen sent, results pending. pt npo per team, taking po meds well with water. gu: foley patent and draining adequate amounts of clear, yellow urine. uo >30cc/hr. am k 4.3 (5.7), bun/cr 77/2.0. skin: red area noted to coccyx, barrier cream applied. id: tmax 97.8 po, am wbc 17.0, cultures sent in ed, results pending. social: home health aide remained with pt overnight, very helpful, eases pt's anxiety. plan: serial hct (q8h) guiac all stools ? additional unit prbc monitor mental status routine icu care and monitoring support to pt and family procedure: transfusion of packed cells diagnoses: hyperpotassemia coronary atherosclerosis of native coronary artery congestive heart failure, unspecified acute posthemorrhagic anemia acute kidney failure, unspecified hypertensive chronic kidney disease, unspecified, with chronic kidney disease stage i through stage iv, or unspecified aortic valve disorders chronic kidney disease, unspecified other and unspecified hyperlipidemia unspecified gastritis and gastroduodenitis, with hemorrhage chronic diastolic heart failure 

Answer: The patient is high likely exposed to