Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide







  • Last modified
  • 14 July 2018
  • Datasheet Type(s)
  • Invasive Species
  • Preferred Scientific Name
  • Salmonella
  • Taxonomic Tree
  • Domain: Bacteria
  •   Phylum: Proteobacteria
  •     Class: Gammaproteobacteria
  •       Order: Enterobacteriales
  •         Family: Enterobacteriaceae
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Preferred Scientific Name

  • Salmonella

EPPO code

  • SALLSP (Salmonella sp.)

Taxonomic Tree

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  • Domain: Bacteria
  •     Phylum: Proteobacteria
  •         Class: Gammaproteobacteria
  •             Order: Enterobacteriales
  •                 Family: Enterobacteriaceae
  •                     Genus: Salmonella

Diseases Table

Top of page salmonellosis

Pathogen Characteristics

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The Gram-negative rod-shaped strains of the genus Salmonella display phenotypic characteristics of the family Enterobacteriaceae. Salmonella serovars are generally motile, straight rods with flagella that grow on nutrient agar in aerobic or anaerobic conditions. Salmonella are generally non-lactose fermenters or slow lactose fermenters and most systems for the detection of the organism are based on this property. However, some peculiar serovars rapidly ferment lactose. Identification of Salmonella isolates is based on biochemical tests.

The chemical structure of Salmonella antigens has been determined. Serovars are characterized on the basis of somatic (O), flagellar (H) and capsular (Vi) antigens (LeMinor and Popoff, 1987). Serogroups have been identified on the basis of the O antigens with each serogroup having a group-specific O antigenic factor. Serovars are determined on the basis of the combination of O and H antigens. Vi antigen is a capsular polysaccharide found in S. typhi, S. paratyphi C and S. dublin. In addition, several genotypic typing methods such as ribotyping, pulsed-field gel electrophoresis (PFGE) and amplified fragment length polymorphism (AFLP), and PCR are used to differentiate isolates in epidemiological studies. Phage typing, biotyping, drug resistance and plasmid profile analysis may be used to identify isolates beyond the level of serovar. Phage typing is limited to a few serovars, such as S. typhi, S. typhimurium, S. dublin, S. enteritidis, S. heidelberg and S. schottmuelleri (Clarke and Gyles, 1993).


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Clarke RC; Gyles CL, 1993. Salmonella. Pathogenesis of bacterial infections in animals., Ed. 2:133-153; 71 ref.

LeMinor L; Popoff MY, 1987. Designation of Salmonella enterica sp. nov. as the type and only species of the genus Salmonella. International Journal of Systemic Bacteriology, 37:465-468.