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Salmonella bongori was previously considered a subspecies of S. enterica, but it is now the other species in the genus Salmonella. Most of the human pathogenic Salmonella serovars belong to the enterica subspecies. These serogroups include S. Typhi, S. Enteritidis, S. Paratyphi, S. Typhimurium, and S. Choleraesuis.
The nomenclature of Salmonella enterica has long been a topic of debate in the microbiology community. [16] Originally in the 1880s, Salmonella species were named after the disease, host, or geological location they were associated with; however, this taxonomic characterization was contested due to genus members being categorized incompatibly with their genetic similarities.
Salmonellosis is a symptomatic infection caused by bacteria of the Salmonella type. [1] It is the most common disease to be known as food poisoning (though the name refers to food-borne illness in general), these are defined as diseases, usually either infectious or toxic in nature, caused by agents that enter the body through the ingestion of food.
Symptoms of a salmonella infection include diarrhoea, stomach cramps, nausea, vomiting and fever, and usually develop within 12 to 72 hours and last from four to seven days.
Salmonella species can be found in the digestive tracts of humans and animals, especially reptiles. Salmonella on the skin of reptiles or amphibians can be passed to people who handle the animals. [39] Food and water can also be contaminated with the bacteria if they come in contact with the feces of infected people or animals. [40]
Hektoen enteric agar (HEK, HE or HEA) is a selective and differential agar [1] primarily used to recover Salmonella and Shigella from patient specimens. HEA contains indicators of lactose fermentation and hydrogen sulfide production; as well as inhibitors to prevent the growth of Gram-positive bacteria.
Autoimmune causes of enteritis such as Crohn's disease require significant chronic treatment to avoid nutritional deficiencies, cancer, bacterial overgrowth, and other complications. [5] Some patients with mild forms of the disease may not need treatment, but a majority of people with Crohn's disease require glucocorticoid medications. [24]
Typhoid fever, also known simply as typhoid, is a disease caused by Salmonella enterica serotype Typhi bacteria, also called Salmonella typhi. [ 2 ] [ 3 ] Symptoms vary from mild to severe, and usually begin six to 30 days after exposure.