Which of the following is NOT a type of bacterial infection?

Giardiasis is not a bacterial infection; rather, it is caused by a parasitic organism known as Giardia lamblia. This parasite can infect the intestines of humans and animals, leading to gastrointestinal symptoms such as diarrhea, cramps, and fatigue. The other options listed are all caused by bacteria.

Cholera is caused by the bacterium Vibrio cholerae, which can lead to severe dehydration and diarrhea. Typhoid fever is caused by Salmonella typhi, and it can also result in systemic illness. Salmonellosis involves infections by various Salmonella species, typically leading to gastrointestinal distress. Understanding the distinction between bacterial and parasitic infections is vital for effective diagnosis and treatment, as they require different approaches in management and prevention.