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Group A streptococcal infections are a number of infections with Streptococcus pyogenes, a group A streptococcus (GAS). [1] S. pyogenes is a species of beta-hemolytic Gram-positive bacteria that is responsible for a wide range of infections that are mostly common and fairly mild. If the bacteria enters the bloodstream, the infection can become ...
This is the most common type of group A strep infection, ... or drink from the same glass or eat from the same plate as an infected person, according to the CDC. ... “It needs antibiotics for ...
Similarly, group B streptococcus typically denotes Streptococcus agalactiae, although minor beta-hemolytic group B streptococci like S. troglodytidis exist. [15] While most streptococcal illnesses in humans originate from species adapted to humans, such as S. pneumoniae or S. pyogenes, there are zoonotic species capable of causing infections. [15]
However, both Streptococcus dysgalactiae and the Streptococcus anginosus group can possess group A antigen as well. Group A streptococci, when grown on blood agar, typically produce small (2–3 mm) zones of beta-hemolysis, a complete destruction of red blood cells. The name group A (beta-hemolytic) Streptococcus is thus also used. [1]
Group A Streptococcus (Group A Strep or Strep A) bacteria can cause many different infections. The bacteria are commonly found in the throat and on the skin, and some people have no symptoms.
Streptococcal pharyngitis, also known as streptococcal sore throat (strep throat), is pharyngitis (an infection of the pharynx, the back of the throat) caused by Streptococcus pyogenes, a gram-positive, group A streptococcus. [9] [10] Common symptoms include fever, sore throat, red tonsils, and enlarged lymph nodes in the front of the neck.
Strep throat is an infection in the throat and tonsils caused by bacteria called group A Streptococcus. It often comes with a fever, sore throat, pain when swallowing and red and swollen tonsils ...
[1] [5] [6] When caused by the bacterium group A streptococcus, it is classed as streptococcal tonsillitis [11] also referred to as strep throat. [12] Rarely bacteria such as Neisseria gonorrhoeae, Corynebacterium diphtheriae, or Haemophilus influenzae may be the cause. [5] Typically the infection is spread between people through the air. [6]