Salmonella Typhosa is a bacterial species that causes typhoid fever, a serious infectious disease. In scientific literature, this bacterium is commonly referred to as simply S. Typhosa. However, there are several other synonyms that can be used interchangeably, including Salmonella enterica serovar Typhi, Salmonella Typhi, and Typhoid bacillus. These names all refer to the same bacterial species responsible for typhoid fever, which is transmitted through consumption of contaminated food or water. Recognizing these synonyms is important in understanding scientific research related to this bacterium and developing effective treatments for typhoid fever.