S.typhimurium
Classification
Bacteria; Domain; Proteobacteria; Gammaproteobacteria
Species
Salmonella choleraesuis serotype typhimurium; Salmonella typhi-murium; Bacillus typhimurium
Description and Significance
S.typhimurium is a genus of rod-shaped, Gram-negative, nonspore forming,and motile enterobacteria with diameters around 0.7 to 1.5 µm, lengths from 2 to 5 µm, and flagella that grade in all directions[5]. They are chemoorganotrophs, obtaining their energy from oxidation and reduction reactions using organic sources, and are facultative anaerobes. Most species produce hydrogen sulfide, which can be detected by growing them on media containing ferrous sulfate, like TSI[5]. Most isolates exist in two phases: a motile phase I and a nonmotile phase II. Cultures that are nonmotile upon primary culture may be switched to the motile phase using a Cragie tube[2].
Genome Structure
The genome structure of Salmonella typhimurium has a chromosome that is 4,857 kilobases long and a virulence plasmid that is 94 kilobases long[2].
Cell Structure, Metabolism and Life Cycle
Interesting features of cell structure; how it gains energy; what important molecules it produces.
Ecology and Pathogenesis
Habitat; symbiosis; biogeochemical significance; contributions to environment.
If relevant, how does this organism cause disease? Human, animal, plant hosts? Virulence factors, as well as patient symptoms.
References
Author
Page authored by _____, student of Prof. Doreen Cunningham at Saint Augustine's College.