2nd August 2023

A 36 year old office worker presents with a 3 day history of profuse watery diarrhoea, abdominal pain, and nausea.

A 36 year old office worker presents with a 3 day history of profuse watery diarrhoea, abdominal pain, and nausea. He has no recent travel history of note, and no other close contact has similar symptoms. The stool sample reveals red cysts after being stained with the modified Ziehl-Neelson stain.

What is the first line treatment to manage this condition?

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