A Middle Aged Lady with Pyrexia and Infiltrates on Chest Radiograph

A 55 year old non smoker house wife, residing in the premises of a cotton factory, came to accident and emergency department with one week history of dyspnea and chest pain associated with cough productive of purulent sputum occasionally stained with blood. She was normotensive (blood pressure 124/85 mmHg), tachycardic (pulse 110/m), tachypneoic (respiratory rate 28/min) & had fever of 39oC. Her chest examination revealed coarse crackles on the left upper side anteriorly while remaining systemic examination was unremarkable.