ⓘ Group A streptococcal infection

                                     

ⓘ Group A streptococcal infection

A group A streptococcal infection is an infection with group A streptococcus. Streptococcus pyogenes comprises the vast majority of the Lancefield group A streptococci, and is often used as a synonym for GAS. However, S. dysgalactiae can also be group A. S. pyogenes is a beta-hemolytic species of Gram positive bacteria that is responsible for a wide range of both invasive and noninvasive infections.

Infection of gas may spread through direct contact with mucus or sores on the skin. Gas infection can cause more than 500.000 deaths per year. Despite the emergence of antibiotics as a treatment for group a β-hemolytic Streptococcus, infection of gas is an increasing problem, especially on the African continent.

There are many other types of streptococci including group B Streptococcus agalactiae and Streptococcus pneumoniae, which cause other types of infections and should not be confused with streptococcal group. A number of virulence factors that contribute to the pathogenesis of gas, such as a protein, hemolysins, and extracellular enzymes.

                                     
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