Which bacterium causes Typhoid Fever?

Salmonella Typhi is the bacterium responsible for Typhoid Fever. This pathogen is a highly specialized bacterium that primarily infects humans and is transmitted primarily through contaminated food or water. Infection occurs when the bacteria invade the intestinal lining and subsequently enter the bloodstream, which can lead to severe systemic illness.

Understanding the characteristics of the bacterium is crucial. Salmonella Typhi is distinct from other types of salmonella, which can cause foodborne illnesses but not Typhoid Fever. The disease manifests with symptoms such as prolonged fever, abdominal pain, and gastrointestinal disturbances, making it a public health concern in areas with inadequate sanitation and hygiene practices.

The other bacteria listed are not causes of Typhoid Fever. Escherichia coli is commonly associated with food poisoning and gastroenteritis. Streptococcus pneumoniae is known for causing pneumonia and other respiratory illnesses, while Yersinia pestis is infamous for causing the plague. Each of these pathogens has a different mode of transmission, infection site, and clinical presentation, highlighting the specific nature of Salmonella Typhi in relation to Typhoid Fever.