Salmonella spp.
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Salmonella spp.
It is a genus of rod-shaped, Gram-negative, non-spore forming, predominantly motile enterobacteria with diameters around 0.7 to 1.5 µm, lengths from 2 to 5 µm, and flagella which project in all directions (i.e. peritrichous). Most species produce hydrogen sulfide,[1] which can readily be detected by growing them on media containing ferrous sulfate, such as TSI. Salmonella is closely related to the Escherichia genus and are found worldwide in cold- and warm-blooded animals (including humans), and in the environment.
| Kingdom | Bacteria |
|---|---|
| Class | Gamma Proteobacteria |
| Order | Enterobacteriales |
| Family | Enterobacteriaceae |
| Genus | Salmonella |
Contents |
[edit] Surface Characteristics
Their cell wall consist of synthetic disaccharide abequose1-->3α-rhamnose
[edit] Transmission
Many infections are due to ingestion of contaminated food. The contamination could also be through inhalation of bacteria-laden dust.
[edit] Pathogenic Activity
After a short incubation period of a few hours to one day, the germ multiplies in the intestinal lumen causing an intestinal inflammation with diarrhea that is often muco-purulent and bloody. In infants, dehydration can cause a state of severe toxicosis. They cause illnesses such as typhoid fever, paratyphoid fever, and the foodborne illness salmonellosis.
