Relationships within the Salmonella genus, including species, subspecies, and serovar designations are illustrated. Note that serovars do not have official taxonomic status. Four representative serovars are shown for S. enterica subsp. enterica. Only the most common typhyoidal serovars, and representative non-typhoidal serovars are shown. There are greater than 2500 serovars in total, with the most common disease-causing serovars belonging to S. enterica subsp. Enterica.