The document discusses various bacteria that can cause food poisoning, their sources, and symptoms. It states that bacterial contamination is the most common cause of food poisoning. It then provides details on specific bacteria like Campylobacter, Clostridium botulinum, E. coli 0157, Salmonella, Staphylococcus aureus, and Bacillus cereus. For each, it lists typical sources like raw meat or poultry and signs like diarrhea, fever, and abdominal pain. Campylobacter is highlighted as the most frequent cause in the UK, often from raw chicken. Proper food handling and cooking is advised to prevent contamination.