30th July 2023

A 45-year-old woman, with a background of type 1 diabetes mellitus, presents to her GP with a two-month history of diarrhoea

A 45-year-old woman, with a background of type 1 diabetes mellitus, presents to her GP with a two-month history of diarrhoea and bloating. Her GP is considering a diagnosis of small intestinal bacterial overgrowth.

Which of the following investigations is most useful to confirm this diagnosis?

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