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: mr. is an 86 year-old russian man initially admitted to the medical service on with a change in mental status. the patient had been increasingly fatigued over the week prior to admission becoming completely dependent on activities of daily living. he had one episode of transient hypertension. he was initially brought to the emergency department for these complaints. at this point he was minimally responsive and unable to follow commands. he appeared dehydrated. head ct at this point as well as urinalysis and chest x-ray were negative. he initially improved slightly after intravenous fluids. he was admitted, however, over the subsequent weekend his mental status began to decrease. a neurology consult was obtained. , m.d. dictated by: medquist36 procedure: venous catheterization, not elsewhere classified continuous invasive mechanical ventilation for 96 consecutive hours or more spinal tap incision of lung insertion of endotracheal tube enteral infusion of concentrated nutritional substances thoracentesis percutaneous [endoscopic] gastrostomy [peg] biopsy of blood vessel diagnoses: esophageal reflux hyposmolality and/or hyponatremia atrial fibrillation methicillin susceptible staphylococcus aureus septicemia pneumonitis due to inhalation of food or vomitus grand mal status coma major depressive affective disorder, single episode, severe, specified as with psychotic behavior 

Answer: The patient is high likely exposed to