Salmonella is a type of BACTERIA that can cause food poisoning. It is a rod-shaped, Gram-negative bacterium that is found in the intestines of humans and other warm-blooded animals. Salmonella can be spread through contaminated food or water, and can cause symptoms such as diarrhea, fever, and abdominal cramps. It is important to practice good hygiene and cook food thoroughly to prevent salmonella infection.