Definition of retain. transitive verb. 1a : to keep in possession or useb : to keep in one's pay or service; specifically : to employ by paying a retainerc : to keep in mind or memory : remember.
However, some gram- positive bacteria may also have capsules. Examples for gram-negative bacteria with capsules: Escherichia â¦coli, Klebsiella pneumoniae, Salmonella. Examples for gram-positive bacteria with capsules : Bacillus megaterium, Streptococcus pyogenes, Sterptococcus pneumoniae.
Most of the living bacteria that are known to be parasitic and cause diseases are also found in this kingdom. The three basic morphological types of bacteria are: bacillus (rod shaped), cocci (spherical), and curved/helical. Salmonella enteritidis is a bacillus shaped bacteria.almonella enteritidis belongs in the Bacteria domain as it is prokaryotic, lacks a true nucleus, lacks membrane bound organelles, and contains peptidoglycan in the cell walls. Eubacteria: Also known as âtrue bacteria,â the. is the most common kind of bacteria found today.