Final answer:
Raw or undercooked chicken and unpasteurized milk are two primary food sources of Campylobacter jejuni, which can cause gastroenteritis and other serious complications.
Step-by-step explanation:
Two food sources of Campylobacter jejuni, which is a bacterium that causes gastroenteritis, are raw or undercooked chicken and unpasteurized milk. This organism is known to be one of the leading causes of bacterial foodborne illnesses and is commonly transmitted through foods that have been contaminated either during the slaughter process or by failing to adhere to proper food safety practices.
Ingestion of Campylobacter jejuni can result in symptoms such as fever, diarrhea, cramps, vomiting, and in severe cases, may lead to complications including autoimmune conditions like Guillain-Barré syndrome. Preventing campylobacteriosis involves proper cooking of poultry, pasteurization of milk, and adhering to good hygiene and food safety practices to avoid cross-contamination.