Rapid urease test, also known as the CLO test, is a rapid diagnostic test for diagnosis of Helicobacter pylori. The basis of the test is the ability of H. pylori to secrete the urease enzyme, which catalyzes the conversion of urea to ammonia and carbon dioxide.

What does a CLO test show?

What is CLO Testing? CLO stands for Campylobacter-like organism and is also known as the Rapid Urease Test. This diagnostic test is used for the detection of Helicobacter pylori by finding the presence of urease. Urease is an enzyme that is produced by Helicobacter pylori.

How long does a CLO test take?

During your gastroscopy, we have taken a small biopsy. This is called a Clo-test. The Clo-test takes about 5 minutes to process and we may be able to give you the result before you leave the department.