Short answer · Medically reviewed summary · Last updated: 2026-04-08
Clostridium difficile infection (often referred to as C. diff) is primarily identified by the onset of watery diarrhea, typically occurring after recent antibiotic use, accompanied by abdominal cramping and fever.
Clostridium difficile infection (often referred to as C. diff) is primarily identified by the onset of watery diarrhea, typically occurring after recent antibiotic use, accompanied by abdominal cramping and fever. A definitive diagnosis requires laboratory stool testing, as symptoms can overlap with various other gastrointestinal conditions.
The hallmark symptom of Clostridium difficile infection is frequent, watery diarrhea, often occurring three or more times a day for several days. Unlike common stomach bugs, these stools often have a distinct, strong, and foul odor. Early on, you may notice significant abdominal tenderness or cramping. Because Clostridium difficile infection is often triggered by a disruption of healthy gut bacteria—frequently due to recent or current antibiotic use—it is vital to monitor your bowel habits closely if you are taking or have recently finished a course of antibiotics.
When monitoring your health, look for patterns that deviate from your normal baseline. While occasional loose stools can be caused by diet or minor viral illnesses, Clostridium difficile infection usually presents with persistent, watery diarrhea that does not improve after 24 to 48 hours. Consider these common indicators:
If you suspect you have Clostridium difficile infection, contact your healthcare provider promptly, especially if you are over age 65 or have a compromised immune system. When you speak to your doctor, be specific: mention any recent antibiotic use, the duration of your symptoms, and the presence of blood or mucus in your stool. To diagnose Clostridium difficile infection, physicians typically order a stool sample test. Ask your doctor specifically about a "C. diff toxin test" or a "PCR test for C. difficile," which detect the presence of the bacteria's toxins in your system.
Some cases of Clostridium difficile infection can progress rapidly and lead to severe complications like colitis or toxic megacolon. Seek emergency medical attention immediately if you experience:
If you feel your symptoms are being ignored, clearly state your concerns regarding your antibiotic history and the duration of your diarrhea. You have the right to ask, "Could this be a Clostridium difficile infection?" If you are not satisfied, seek a second opinion from a gastroenterologist or an infectious disease specialist. At DiseaseMaps.org, we have seen members find strength in sharing their experiences; if you are struggling to get a diagnosis, documenting your symptom timeline can provide the objective data doctors need to take your concerns seriously.
Medical disclaimer: This information is for educational purposes only and does not constitute professional medical advice, diagnosis, or treatment; always seek the advice of your physician with any questions regarding a medical condition.