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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.



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.


References in periodicals archive ?
The genome-wide SNP phylogeny provided more accurate insights into the variation of Salmonella Paratyphi A strains in China.
Salmonella paratyphi causes food poisoning (Salmonellosis), a major cause of death in United States between the years 1990 - 1998 [17].
Increasing rates of Salmonella Paratyphi A and the current status of its vaccine development.
Simultaneously, retrospective analysis was done from January 2003-December 2005 to study any difference in the incidence and antimicrobial susceptibility pattern of Salmonella Paratyphi A among enteric fever patients.
On October 5, NCDPH informed PulseNet ([dagger]) that tests of isolates from three other persons revealed Salmonella Paratyphi B var.
DISCUSSION: Wound infection is a common surgical complication and Salmonella paratyphi B is the rarest etiological agent; which presents as delay in post-surgical wound healing.
Identification and sensitivity were repeated from isolated colony grown on MacConkey agar which turned out to be Salmonella Paratyphi A, susceptible to nalidixic acid, ciprofloxacin, ceftriaxone and cefixime.
Multinational Salmonella Paratyphi B variant Java (Salmonella Java) outbreak, August-December 2007.
Treatment of chronic carriers of Salmonella typhi and Salmonella paratyphi B with trimethoprim-sulfamethoxazole.
Evidence That Gall Bladder Carriage of Salmonella Paratyphi A Maybe an Important Factor in the Increasing Incidence of This Infection in South Asia.