Salmonella


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Salmonella

[‚sal·mə′nel·ə]
(microbiology)
A genus of gram-negative, facultatively anaerobic bacteria belonging to the family Enterobacteriaceae that cause enteric infections with or without blood invasion. Most species are motile, utilize citrate, decarboxylate ornithine, form gas from glucose, and produce hydrogen sulfide. Salmonellae do not ferment lactose, produce indole, or split urea; the Voges-Proskauer reaction is negative.

Salmonella

 

a genus of nonsporogenous rod-shaped bacteria that are 1–7 μm long and approximately 0.3–0.7 μm wide. It includes gram-negative facultative aerobes, most of which are motile because they are peritrichous. Salmonella was named in honor of the American pathologist D. E. Salmon (1850–1914).

Salmonellas form round grayish white colonies on solid nutrient mediums and an opacity and sediment and sometimes a film when grown in broth. They ferment carbohydrates, including glucose, mannose, xylose, and dextrin, and alcohols, including inositol and dulcite; an acid and sometimes a gas are formed as well.

Salmonellas generally inhabit the intestine of animals and man. Most belong to pathogenic species that produce various antigens, including the thermolabile flagellate H antigen and the O and V antigens, which consist of carbohydrates. There are more than 20 species in the genus, with more than 1,200 serotypes that differ in antigenic structure and biochemical properties. Among salmonellas are the causative agents of typhoid fever and paratyphoid in humans and salmonelloses in humans and animals.

A. A. IMSHENETSKII

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Blood and stool culture grew Salmonella enteritidis sensitive to ampicillin, aztreonam, ceftriaxone, ciprofloxacin, piperacillin/tazobactam, and trimethoprim/sulfamethoxazole.
Recurrent Salmonella infection is a debilitating condition among patients with SLE.
In spite of the discrepancies between the mechanisms used by Salmonella enterica to colonize the tumor, once Salmonella enterica reaches the tumor, its permanence in the tissue is associated to low macrophage and neutrophil activity due to the hypoxia within the tumor [32] and to the suppression of the immune response mediated by cytokines such as TGF-[beta] [19] and the difficult access to the tumor microenvironment of preexisting anti-Salmonella antibodies and complement cascade factors due to the irregular growth of blood vessels in the tumor microenvironment [33].
The Centers for Disease Control and Prevention (CDC) estimates that approximately 1.2 million illnesses and approximately 450 deaths occur annually in the United States due to nontyphoidal salmonella. Most people infected with salmonella develop diarrhea, fever and abdominal cramps 12 to 72 hours after infection.
Food and Drug Administration to investigate the cause of the Salmonella contamination.
The (https://edition.cnn.com/2019/08/22/health/drug-resistant-salmonella-cdc-warning/index.html) CDC links the occurrence to the beef acquired from the United States and soft cheese from Mexico, suggesting that MDR Salmonella is carried by the cattle in both countries.
In fact, the egg is the most common cause of the salmonella infection in Slovakia.People's food habits have also changed, and they are now eating more raw food, including fish and oysters, Avdiova added.
Elderly, people with weakened immune systems and young children are at the highest risk for salmonella infection.
We characterized isolates by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (Bruker Daltonik GmbH, Bremen, Germany) and serotyping (French National Reference Center for Salmonella).
Conclusion: Azithromycin, Aztreonam, Imipenem, tygecycline, cefpodoxime and cefpirome are potential therapeutic agents for resistant Salmonella Paratyphi A infections.
Conclusion: This is the first study of its kind in Iran to determine the sequence types of the clinical isolates of Salmonella Typhimurium in Tehran hospitals using MLST.