Jednoćelijski mikroorganizmi koji zauzimaju veliki domen na teorijskom ,,Drvetu života ̎. To su različiti i sveprisutni mikroorganizmi sa genotipskim i fenotipske karakteristike koje ih razlikuju od ostalih domena. Po ćelijskom sastavu i strukturi pripadaju prokariotama.
Knechtges P, Food Safety: Theory and Practice, Jores&Bartlett Publishers, 2011, ,
Termin:
Bacteria
Definicija:
The bacteria are single-celled microorganisms that represent a major domain on the theoretical Tree of Life. They are diverse and ubiquitous microorganisms with genetic identities and phenotypic characteristics that distinguish them from the other domains. Their cellular composition and structures are ,,prokaryotic,, in nature.