''Eubacterium'' is a genus of

Gram-positive bacteria In bacteriology, gram-positive bacteria are bacteria that give a positive result in the Gram stain test, which is traditionally used to quickly classify bacteria into two broad categories according to their type of cell wall. Gram-positive bact ...

in the family

Eubacteriaceae The Eubacteriaceae are a family of Gram-positive bacteria in the order Clostridiales. Phylogeny The currently accepted taxonomy based on the List of Prokaryotic names with Standing in Nomenclature (LPSN) and the National Center for Biotechnology ...

. These bacteria are characterised by a rigid

cell wall A cell wall is a structural layer surrounding some types of cells, just outside the cell membrane. It can be tough, flexible, and sometimes rigid. It provides the cell with both structural support and protection, and also acts as a filtering mech ...

. They may either be motile or nonmotile. If motile, they have a

flagellum A flagellum (; ) is a hairlike appendage that protrudes from certain plant and animal sperm cells, and from a wide range of microorganisms to provide motility. Many protists with flagella are termed as flagellates. A microorganism may have f ...

. A typical flagellum consists of a basal body, filament, and hook. The long filament is the organ which helps eubacteria move. Gram-positive bacteria have a thick proteoglycan layer and take up violet Gram stain (whereas Gram-negative bacteria have a thinner proteoglycan layer which is surrounded by a layer of immune response-inducing lipopolysaccharide, and do not take up Gram stain).

References

Eubacteriaceae Bacterial vaginosis Bacteria genera {{Clostridia-stub