Why does it take a few hours before a person feels ill with salmonella?

Salmonella infection typically takes a few hours to days to manifest symptoms because the bacteria need time to multiply and produce toxins in the gastrointestinal tract after ingestion. The incubation period varies based on the amount of bacteria consumed and the individual's immune response. Once the bacteria reach a sufficient level, they trigger an inflammatory response, leading to symptoms like diarrhea, fever, and abdominal cramps. This delay is common in many foodborne illnesses as the body reacts to the pathogen.