Quali sono le principali tossine prodotte dagli streptococchi patogeni?
Quali sono le principali tossine prodotte dagli streptococchi patogeni?
La streptolisina è una proteina ad azione emolitica prodotta da alcuni Streptococchi (gruppo A, C e G); la variante O è una delle due emolisine (l'altra è la streptolisina S) prodotta praticamente dalla maggior parte dei ceppi di Streptococcus pyogenes (o streptococco beta emolitico di gruppo A) e da molti di quelli ...
What is Streptococcus pyogenes?
- Streptococcus pyogenes, sometimes called Strep pyogenes, can be broken down into “strepto” which means chain, “coccus”, which refers to round shape, “pyo” which means pus, and “genes” which refers to forming. So, Strep pyogenes are round bacteria that grow in chains, responsible for a number of infections that often present with pus.
What is Streptococcus pneumo´Nia?
- Streptococcus pneumo´niae a small, slightly elongated, encapsulated coccus, one end of which is pointed or lance-shaped; the organisms commonly occur in pairs. This is the most common cause of lobar pneumonia, and it also causes serious forms of meningitis, septicemia, empyema, and peritonitis.
Is Streptococcus dysgalactiae pathogenic?
- It is an infrequent, but usually pathogenic, part of the skin microbiota. It is the predominant species harboring the Lancefield group A antigen, and is often called group A streptococcus (GAS). However, both Streptococcus dysgalactiae and the Streptococcus anginosus group can possess group A antigen.
How many serotypes of Streptococcus are there?
- There are some 80 serotypes distinguished by the polysaccharide hapten of the capsular substance. Called also pneumococcus. Streptococcus pyo´genes a beta-hemolytic, toxigenic, pyogenic species that causes septic sore throat, scarlet fever, rheumatic fever, puerperal fever, acute glomerulonephritis, and other conditions in humans.
