A 32 years old, low body weight patient, c/o low-grade fever and weakness not responding to any treatment. His TLC 10600, MP negative, widal negative after seven days of fever, urine normal, on examination only Left lower chest anteriorly and posteriorly has crepts/rales. Thx is fix 10400.

X-ray posted, sputum normal. He works in an export garment factory for six years. Now decide, what is this phenomenon?