Infection of Salmonella typhi leads to the development of typhoid, or enteric fever. This disease is characterized by the sudden onset of a sustained and systemic fever, severe headache, nausea, and loss of appetite.
Salmonella is a genus of rod-shaped (bacillus) bacteria of the Enterobacteriaceae family. There are two species of Salmonella, Salmonella bongori and Salmonella enterica. Salmonella enterica is further divided into six subspecies and over 2500 serovars.