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Streptococcus

Kingdom:	Bacteria
Phylum:	Firmicutes
Class:	Bacilli
Order:	Lactobacillales
Family:	Streptococcaceae
Genus:	Streptococcus

Species

S. agalactiae
S. avium
S. bovis
S. durans
S. pneumoniae
S. pyogenes
S. viridans

Streptococcus is a genus of spherical, Gram-positive bacteria of the phylum Firmicutes. These bacteria grow in chains or pairs, with cell division occurring only along one axis. In this sense they are contrasted with Staphylococcus, which divides along several axes, generating a " cluster " of cells, which resemble clusters of grapes.

Members of the genus Streptococcus which cause diseaseA disease is any abnormal condition of the body or mind that causes discomfort, dysfunction, or distress to the person affected or those in contact with the person. Sometimes the term is used broadly to include injuries, disabilities, syndromes, symptoms, include:

Group A Streptococci ( Streptococcus pyogenes) which causes Group A streptococcal infectionThe group A streptococcus bacterium Streptococcus pyogenes is responsible for most cases of streptococcal illness. Other types (B, C, D, and G) may also cause infection. Group B streptococci cause most streptococcal infections in newborns and maternal pos
Group B Streptococci ( Streptococcus agalactiae ) which causes meningitisMeningitis is inflammation of the membranes ( meninges) covering the brain and the spinal cord. Although the most common causes are infection (either bacterial or viral), chemical agents and even tumor cells may cause meningitis. Encephalitis and brain ab in neonates and the elderly, with occasional systemic bacteremia. They can also colonise the female reproductive tract, increasing the risk for premature rupture of membranes and transmission to the child.
Group D Streptococci (S. durans, S. avium, S. bovis)
Streptococcus pneumoniae which can cause pneumonia
Streptococcus viridans group which cause endocarditis and dental abscess es.

Transmission

Streptococcus are part of the normal flora of the mouth, skin, intestine and upper respiratory tract of humans.

Specific strains or species can be transmitted in several ways:

Physical contact
Using the same eating and drinking utensils as someone who has the bacteria
Coughing, sneezing, or breathing on someone
Touching the same doorknobs, faucets, etc.

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Firmicutes

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Topics: Streptococcus Pneumoniae, Streptococcus Viridans...

Streptococcusagalactiae S. avium S. bovis S. durans S. pneumoniae S. pyogenes S. viridans Streptococcus is a genus of spherical, Gram-positive bacteria of the phylum Firmicutes. These bacteria grow in chains or pairs, with cell division occurring only along one axis.

Streptococcus pneumoniaeStreptococcus pneumoniae is a species of Streptococcus that is a major human pathogen. It was recognized as a major cause of pneumonia in the 1880s, and is the subject of many humoral immunity studies. The organism was originally named Diplococcus pneumon

Streptococcus viridansStreptococcus viridans is a large group of generally non-pathogenic Streptococcus that are all alpha hemolytic and produce a green (hence the name) coloration on blood agar. It is actually a misnomer as there is no Streptococcus with the species name of v

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