All tests › Stool tests

Clostridioides difficile toxin

Stool tests · also printed as C. diff toxin, C difficile toxin, CDT, C. difficile, Clostridium difficile toxin

Typical UK adult rangeExpected result: Negative

Negative is the expected result.

What this test measures

This test looks for the toxin made by the bacterium C. difficile, a cause of diarrhoea that most often follows antibiotic treatment.

Why doctors request it

Requested for diarrhoea during or after antibiotics, or in hospital.

What commonly pushes it up

Current C. difficile infection

What commonly pushes it down

A negative result is the usual finding

Everyday reasons for a value outside the range

Some people carry the bacterium without the toxin; the lab reports this separately

About the sample

A loose stool sample, sent promptly.

Written by a UK consultant physician. Typical UK adult reference ranges; your laboratory's own printed range takes precedence.

Got a report with Clostridioides difficile toxin on it?

Upload a photo or PDF and see every line against the range your lab printed, explained in plain English. First report free.

Read my report free

This is an educational summary of results you uploaded. It is not medical advice, a diagnosis or a treatment plan, and it does not replace the doctor who requested the test. If you are worried, or a result is marked outside range, discuss it with your doctor. Written and reviewed by a UK consultant physician. Reference ranges vary between laboratories.