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.
CRE are bacteria that are resistant to most antibiotics due to the production of an enzyme called carbapenemase. Enterobacteriaceae is a family of bacteria and many of these bacteria live in our environment (such as soil or water).RE are bacteria that are resistant to most antibiotics due to the production of an enzyme called carbapenemase. Enterobacteriaceae is a family of bacteria and many of these bacteria live in our environment (such as soil or water).