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: the patient is a 54 year old man with a history of interstitial pulmonary fibrosis, uip who presents with fever and sudden shortness of breath. the patient has shortness of breath at baseline, requiring home oxygen of two to four liters. he is on chronic prednisone treatment, gamma interferon for his interstitial pulmonary fibrosis. sudden shortness of breath is thought to be decompensation of his interstitial pulmonary fibrosis that has been waxing and in severity. the patient was started on levaquin 500 mg daily to cover a missed pneumonia. a chest x-ray shows an old right lower lobe nodule, thought to be rounded atelectasis. the patient unlikely has pulmonary embolus. the patient was stabilized in the emergency room with oxygen saturation of 97% on four liters of oxygen. past medical history: 1. interstitial pulmonary fibrosis. 2. t7 compression fracture. 3. no cardiac history. medications on admission: prednisone 35 mg p.o.q.d., gamma interferon 200 mcg q. monday, wednesday and friday, bactrim 500 mg i.v.t.i.d., ambien 10 mg p.o.q.h.s. allergies: the patient has no known drug allergies. physical examination: on physical examination, the patient had a temperature of 97.9, heart rate 74, respiratory rate 20, blood pressure 100/70 and oxygen saturation 97% on four liters oxygen. the patient had bilateral dry crackles two-thirds up the base. the patient was alert and oriented times three. laboratory data: admission white blood cell count was 5.9, hematocrit 33.5, platelet count 219,000, electrolytes within normal limits, ck 43 and troponin-i less than 0.3. blood cultures were also negative. chest x-ray showed right lower lobe opacity consistent with a pneumonia superimposed upon a chronic interstitial fibrosis, fullness in the right hilar region , m.d. dictated by: medquist36 procedure: continuous invasive mechanical ventilation for less than 96 consecutive hours insertion of endotracheal tube arterial catheterization diagnoses: pneumonia, organism unspecified acute respiratory failure postinflammatory pulmonary fibrosis 

Answer: The patient is high likely exposed to