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.
(stÄf'ÉlÉkÅk`És) , any of the pathogenic bacteria bacteria[pl. of bacterium], microscopic unicellular prokaryotic organisms characterized by the lack of a membrane-bound nucleus and membrane-bound organelles.Once considered a part of the plant kingdom, bacteria were eventually placed in a separate kingdom, Monera......Click the link for more information. , parasitic to humans, that belong to the genus Staphylococcus.The spherical bacterial cells (cocci) typically occur in irregular clusters [Gr. staphyle =bunch of grapes]. The term staphylococcus is also sometimes used loosely for the cluster arrangement itself and, broadly, for any bacteria with such a growth pattern.nce considered a part of the plant kingdom, bacteria were eventually placed in a separate kingdom, Monera...... Click the link for more information. , parasitic to humans, that belong to the genus Staphylococcus.