Gram Positive Diplococci Bacteria. Two of the most common Gram-positive diplococcus includes Streptococcus pneumoniae and Enterococcus species. Normally, Streptococcus pneumoniae lives as a commensal in the mucosal surfaces of the respiratory system in human beings.

2023年5月30日 · Gram-positive bacteria comprise cocci, bacilli, or branching filaments. Gram-positive cocci include Staphylococcus (catalase-positive), which grows clusters, and Streptococcus (catalase-negative), which grows in chains.

The gram-positive cocci are a large group of bacteria with similar morphology. All are spherical or nearly so, but they vary considerably in size. Members of some genera are identifiable by the way cells are attached to one another: in pockets, in chains, or grape-like clusters.

For instance, gram-positive cocci seen in tetrads and clusters or in long chains are highly characteristic of staphylococci and streptococci, respec-tively [T1] [I1a] [I1b], but may appear gram-negative because of overdecol-oration. Similarly, classic gram-positive diplococci are lancet-shaped or pointed at the outside ends [T1] [I1c]. If gram-

2024年1月16日 · When bacteria retain the crystal violet dye during the Gram stain test, they are called Gram-positive bacteria. Learn more here.

Positive Gram stain. If your test result reveals a positive Gram stain, it means that bacteria were present in your sample. If your result is positive, it usually includes information about what kind of organism was present on the sample slide, including: Type of bacteria: Gram-positive or gram-negative. Shape of bacteria: Round (cocci) or rods ...

Streptococcus pneumoniae (pneumococci) are gram-positive, alpha-hemolytic, aerobic, encapsulated diplococci. Pneumococcal infection is a major cause of otitis media, pneumonia, sepsis, meningitis, and death. Diagnosis is by Gram stain and culture.