Phylogenetic Tree and Meaning


Salmon- (little salmon)    

 Salmon (Image by denn)


 -ella (in intestines)

 Intestines (Image from Microsoft Clip Art)




enteron = gut
                  -idis = inflammation



Large Tree (User Created)

I created this phylogenetic tree (above) based on molecular data.  More specifically, this can be done through the use of extragenic palindromic (REP) sequences, the enterobacterial repetitive intergenic consensus (ERIC) sequences, and the 16S–23S rDNA intergenic spacer region (ITS1).  Salmonella enteritidis is the most common species of Salmonella that infects humans. 




Salmonella species tree (User Created)

There has been ongoing debate about how the different species and subspecies fit in under the genus, Salmonella.  I compiled the information above into a phylogenetic tree based upon the most current commonly accepted system.  The old system included the species S. choleraesuis instead of the newly accepted S. enterica.  Salmonella enteritidis is a heterotypic synonym of the subspecies, Salmonella enterica subsp. enterica.  (S. paratyphi, S. typhi, and S. typhimurium are also heterotypic synonyms of this particular subspecies).  Again, these species and subspecies are separated by  using molecular tools; DNA-DNA homologie data is commonly used for separation.



If you are feeling daring, click here to see a great outside link that includes Salmonella plus many more types of bacteria and archaea.


Salmonella typhimurium (Copyright Dennis Kunkel Microscopy, Inc.)

Salmonella enterica (Copyright Dennis Kunkel Microscopy, Inc.)








                Salmonella typhimum
  Copyright Dennis Kunkel Microscopy, Inc.


                                                                                 Salmonella enterica
                                                                Copyright Dennis Kunkel Microscopy, Inc.



 Now that the background classification information is done
   it is time to learn about adaptations of
Salmonella enteritidis!