Eubacterium: Definition, Types, and Importance

Eubacteria, also known as "true" bacteria, are single-celled prokaryotic microorganisms that have a variety of characteristics and can be found in a variety of environments around the world. Except for archaebacteria, this term encompasses all types of bacteria. Because eubacteria are so common, they belong to one of the three domains of life: Bacteria. Eubacterium treatment is accomplished through the use of medications.

Characteristics of Eubacteria 

Eubacteria, or microorganisms without a defined membrane nucleus, share a number of characteristics. They lack membrane-bound organelles because they are prokaryotes. The cellular wall of most eubacteria is made up of peptidoglycans in a cross-linked chain pattern. This provides the bacteria's wall with the strength it requires to maintain its shape and size in changing environments. Small molecules can pass through the cell wall, but larger molecules and ions require the presence of carrier proteins and channel proteins in order to enter the cell.

A flagellum is a structure found in some bacteria (a structure composed of protein filaments that is used for movement). Other bacteria have pili, which are small projections on the cell's surface used for adhering to surfaces and transferring DNA. A biofilm is formed when a large number of bacteria attach to a surface and are surrounded by a polysaccharide sac. This compound has a high level of antimicrobial resistance.

The cytosol is the fluid contained by the bacteria's plasma membrane. It is primarily composed of water (about 80%), but it has a gel-like consistency due to the presence of dissolved nutrients, cytoskeletal elements, DNA, and other substances. We can define ribosomes as organelles composed of RNA and protein that complete the process of protein translation in Eubacteria.

Types of Eubacteria

Bacteria are classified into three types based on their shape: bacilli, cocci, and spirilla. Bacilli are rod-shaped, cocci are spherical, and spirilla are spiral- or wave-shaped. Bacteria may remain linked after division, forming clusters, filaments, and tight coils.

Gram-positive, Gram-negative, and Miscellaneous Eubacteria are the most common types of Eubacteria. While the Domain Bacteria contains many phyla of eubacteria, these relationships are constantly changing and are still being defined based on new DNA experiments. 

The bacterial outer membrane is an additional layer that surrounds the cell wall in some bacteria. This extra layer cannot be stained with a Gram stain, which is commonly used by researchers to classify bacteria. As a result, they are known as “Gram-negative” bacteria or Gram-positive bacteria are those that can be seen with a Gram stain. Gram-negative bacteria typically contain more pathogenic to humans species, whereas Gram-positive bacteria are either beneficial or non-harmful to human health.

Examples of Eubacteria

The Eubacteria domain is home to Escherichia coli, abbreviated as E. coli. It belongs to the Proteobacteria phylum. Because it is rod-shaped and Gram-negative, it has a second membrane surrounding its cell wall. E. coli is commonly found in the guts of many different warm-blooded hosts, including humans – though it can become pathogenic under the right conditions. The majority of strains are harmless (and may even be beneficial), but some can cause food poisoning and other illnesses. The bacteria can only survive for a short period of time outside of a host.

Streptococcus pneumoniae, also known as S. pneumoniae, is a common eubacteria. It is a member of the Firmicutes phylum. It is Gram-positive and has a spherical shape. S. pneumoniae can be found in the respiratory tract, nasal cavity, and sinuses of healthy hosts. The bacteria, however, can become pathogenic and spread to other parts of the body, frequently causing pneumonia and meningitis in immunocompromised hosts. In large quantities, the bacteria can cause a variety of illnesses, including but not limited to bronchitis, acute sinusitis, and sepsis.

Both of these examples demonstrate how the Gram-positive vs. Gram-negative classification of pathogenic bacteria can be deceptive. Many bacteria species can be beneficial or harmful depending on the circumstances.

What is the Mode of Nutrition in Eubacteria?

Both heterotrophic and autotrophic organisms feed on Eubacteria. The most well-known type of nutrition in eubacteria is heterotrophic, which means they must consume food from other organic carbon sources, primarily plant or animal matter. Autotrophs, on the other hand, produce their own food through photosynthesis.

Eubacteria Respiration

Aerobic or anaerobic eubacterial respiration is possible. Aerobic – Survive in the presence of oxygen (strict aerobes) or switch to anaerobic respiration in the absence of oxygen (non-strict aerobes) (facultative anaerobes). Anaerobes use a type of respiration known as fermentation. Some anaerobes can exist in both the presence and absence of oxygen. These are referred to as facultative anaerobes.

Eubacterium Limosum and Eubacterium Limosum Treatment

Eubacterium limosum (strain KIST612) is known as an acetogenic Gram-positive bacterium that is frequently isolated from an anaerobic digester and has a rapid growth rate on synthesis gas (CO; carbon monoxide) when used as the sole energy source.

Names are as follows: KIST612 Eubacterium limosum

Anaerobic respiration necessitates the use of oxygen.

Site of isolation: anaerobic digester

Eubacterium Hallii

Eubacterium hallii is a human gut microbe that can grow and produce butyrate from a variety of carbon sources, including glucose, acetate, and lactate. Eubacterium dolichum is another well-known eubacteria.

Eubacterium eligens is a type of bacteria.

Eubacterium Eligens

Clostridium cluster XIVa members Eubacterium spp are anaerobic Gram-positive non-spore-forming rods; strain ATCC 27750 is a human-gut derived bacterium. Little is known about the role this bacterium plays in the human digestive tract.

Among the Firmicutes, pectin stimulated Eubacterium eligens in particular, while insulin stimulated several species.