Question

A 28-year-old man presents with profuse watery diarrhoea, abdominal cramps and low-grade fever 5 days after starting clindamycin for a dental infection. What is the most appropriate initial diagnostic test?

Accepted Answer

Stool nucleic acid amplification test (NAAT) for Clostridioides difficile toxin genes

Answer

Plain abdominal radiograph

Answer

Stool culture for routine bacteria only

Answer

Serum lactate only

Answer

Colonoscopy immediately

Practice question

A 28-year-old man presents with profuse watery diarrhoea, abdominal cramps and low-grade fever 5 days after starting clindamycin for a dental infection. What is the most appropriate initial diagnostic test?