C. difficile infection is defined by how many loose stools within 24 hours?

C. difficile infection is defined by how many loose stools within 24 hours?

• A. Three or more
• B. One or more
• C. Two or more
• D. Four or more

Answer: (A)

Three or more loose stools within 24 hours is the threshold used to define Clostridioides difficile infection. This cutoff helps distinguish CDI from milder diarrhea and guides when testing for C. difficile toxins or genes is warranted, especially after antibiotic exposure. A single loose stool or two stools in a day do not meet the diagnostic criterion, while four or more would also satisfy the criterion, but three is the standard cutoff applied in practice.

Three or more loose stools within 24 hours is the threshold used to define Clostridioides difficile infection. This cutoff helps distinguish CDI from milder diarrhea and guides when testing for C. difficile toxins or genes is warranted, especially after antibiotic exposure. A single loose stool or two stools in a day do not meet the diagnostic criterion, while four or more would also satisfy the criterion, but three is the standard cutoff applied in practice.