What symptoms are most commonly associated with Campylobacter infection?

Campylobacter infection is primarily associated with gastrointestinal symptoms, particularly diarrhea, which can be either watery or bloody. The rationale behind this is that Campylobacter is a leading cause of bacterial gastroenteritis, often resulting from the consumption of undercooked poultry or unpasteurized dairy products.

In the case of a Campylobacter infection, along with the diarrhea, patients commonly experience severe abdominal pain due to the intestinal inflammation caused by the bacteria. This abdominal discomfort is often accompanied by other symptoms such as fever and malaise, but the hallmark symptoms of diarrhea and abdominal pain are the most characteristic.

The other options reflect symptom profiles that are not typically associated with Campylobacter infections, which primarily affect the gastrointestinal system, leading to the most common presentation being watery or bloody diarrhea accompanied by abdominal pain.