Which bacteria is associated with watery diarrhea and is mostly found in raw chicken?

Campylobacter jejuni is indeed the bacterium you are looking for, particularly because it is commonly found in raw or undercooked poultry, including chicken. This organism is a leading cause of bacterial gastroenteritis worldwide, and infection with Campylobacter can lead to symptoms such as watery diarrhea, abdominal cramps, fever, and nausea.

Campylobacter jejuni thrives in the intestines of birds, making poultry a significant carrier. The importance of proper cooking and handling of chicken cannot be overstated, as this reduces the risk of cross-contamination and foodborne illnesses associated with this pathogen. Additionally, the watery diarrhea often associated with Campylobacter infections can lead to dehydration if not managed appropriately, further emphasizing the need for proper food safety practices in the kitchen.

In the context of the other choices, while Salmonella is also linked to chicken and can cause diarrhea, the specific association with watery diarrhea and raw chicken is more distinctly tied to Campylobacter jejuni in many outbreaks. Meanwhile, Escherichia coli and Listeria monocytogenes are associated with different sources and types of food, making them less relevant to the question regarding raw chicken and watery diarrhea specifically.