Test Details: Campylobacter infection is diagnosed when a laboratory test detects Campylobacter bacteria in stool (poop), body tissue, or fluids. The test could be a culture that isolates the bacteria or a rapid diagnostic test that detects genetic material of the bacteria. Most people recover from Campylobacter infection without antibiotic treatment. Patients should drink extra fluids as long as diarrheal lasts. Some people with, or at risk for, severe illness might need antibiotic treatment. These people include those who are 65 years or older, pregnant women, and people with weakened immune systems, such as those with a blood disorder, with AIDS, or receiving chemotherapy. Some types of antibiotics may not work for some types of Campylobacter. When antibiotics are necessary, healthcare providers can use laboratory tests to help determine which type of antibiotics will likely be effective.