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.


Scientific classification
Kingdom Bacteria
Class Gamma Proteobacteria
Order Enterobacteriales
Family Enterobacteriaceae
Genus Salmonella


Contents

Surface Characteristics

Their cell wall consist of synthetic disaccharide abequose1-->3α-rhamnose

Transmission

Many infections are due to ingestion of contaminated food. The contamination could also be through inhalation of bacteria-laden dust.

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.


References

Wikipedia