17th August 2023

A 60-year-old woman presents to the clinic with a 2-day history of a painful, swollen, warm, red area on her lower leg

A 60-year-old woman presents to the clinic with a 2-day history of a painful, swollen, warm, red area on her lower leg. She also reports flu-like symptoms, including a headache and fever.

Which of the following investigations would be most beneficial to support the clinical diagnosis of cellulitis?