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.
Report Abuse. Rod shaped bacteria are known as BACILLUS. Bacillus is a genus of rod-shaped bacteria and a member of the division Firmicutes. Bacillus species are obligate aerobes.Ubiquitous in nature, Bacillus includes both free-living and pathogenic species.eport Abuse. Rod shaped bacteria are known as BACILLUS. Bacillus is a genus of rod-shaped bacteria and a member of the division Firmicutes. Bacillus species are obligate aerobes.