CASE ON FEVER AND DM (INT...

A case of fever with weight loss, a 55 year old gentleman with known case T2DM, poorly controlled presented with recurrent episodes of fever and weight loss since 2 months with cough with expectoration since last 2 weeks He was febrile, conscious, oriented not hypoxic, vitals stable. General Examination was normal. Respiratory system examination showed fine crepitations over left basal area Other system examinations were normal Blood investigations showed high TLC, CRP, ESR, normal LFT/KFT.. Sputum was not available for testing.. HbA1c was 9, RBS was 250 What are the major differential diagnosis in this case ?