16th January 2024

A 45-year-old farm worker presents with a 12-year history of dyspnoea, chronic cough, weight loss and general fatigue.

A 45-year-old farm worker presents with a 12-year history of dyspnoea, chronic cough, weight loss and general fatigue. On examination there is evidence of digital clubbing and diffuse inspiratory crackles. Which organism is most likely responsible for this presentation?

Select the SINGLE most appropriate option from the list below. Select ONE option only.