4th September 2020

An 84-year-old lady presents with a 10-day history of worsening breathlessness, cough and chest pain

An 84-year-old lady presents with a 10-day history of worsening breathlessness, cough and chest pain. The cough is productive of a rust-coloured sputum. She has a past medical history of congestive heart failure, hypertension and type 2 diabetes. Her observations are heart rate 110 bpm, respiratory rate 32 bpm, blood pressure 80/50, temperature 38.5°C and O₂ saturation 92%. 

For the patient above, please select the SINGLE most likely causative organism. Select ONE option from the list above.