AKT-2588

Sarah is a 35-year-old woman who presented to her GP with abdominal pain. The pain was burning in nature and was localised to her epigastric area. A stool test for Helicobacter pylori was done, which came back as positive. Accordingly, she was treated with eradication therapy for one week. Despite the treatment, her symptoms have continued. She would like to be tested to check the bacteria has been eradicated. She is not keen on being referred for an endoscopy.

Which of the following investigations should she be referred for?