Both E.coli and Salmonella are unicellular organisms that do not have nucleus or membrane-bound organelles. They both belong to domain Bacteria.
Domain is the highest taxonomic rank in the Three-Domain Classification system given by Carl Woese in 1990.
There are three domains of life - Archaea, Bacteria and Eucarya.
Bacteria are classified under the Bacteria Domain.
They are unicellular and further grouped into five main categories namely :
Since E.coli and Salmonella both belongs to phylum Proteobacteria and domain Bacteria.
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