Which of the following are caused by a bacterial food infection?

Salmonellosis is a foodborne illness caused by Salmonella bacteria, which are often found in raw or undercooked meat, poultry, eggs, and unpasteurized dairy products. When ingested, these bacteria can multiply in the gastrointestinal tract and lead to symptoms such as diarrhea, fever, and abdominal cramps. This connection to bacteria makes salmonellosis a classic example of a bacterial food infection.

In contrast, allergies are immune responses to certain proteins in food rather than infections. Botulism is caused by a toxin produced by the Clostridium botulinum bacteria, which is a toxin-mediated disease, not directly a bacterial infection. Giardia is a protozoan parasite that causes giardiasis and is not a bacterial illness. Thus, the unique characteristic of salmonellosis as a direct result of bacterial infection distinguishes it as the correct answer.