19th January 2024

A 22-year-old female presents to ED with a 2-day history of fever, malaise and pain in her right knee and right ankle.

A 22-year-old female presents to ED with a 2-day history of fever, malaise and pain in her right knee and right ankle. She is otherwise fit and well but recalls having a 3-day episode of diarrhoea and vomiting whilst she was away on holiday to Spain last month. She is suspected of having reactive arthritis. 

What is the most common causative organism?

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