6th July 2023

A 43-year-old female presents with a 24-hour history of worsening leg pain and swelling

A 43-year-old female presents with a 24-hour history of worsening leg pain and swelling. She has recently taken up outdoor freshwater swimming and obtained a laceration to her left leg whilst swimming yesterday. On examination, she is systemically unwell, and her left leg is tender, hot and erythematous with bullae present. You suspect sepsis secondary to cellulitis. What is the most likely causative organism?

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