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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 ...
Erysipelas (/ ˌ ɛ r ə ˈ s ɪ p ə l ə s /) is a relatively common bacterial infection of the superficial layer of the skin (upper dermis), extending to the superficial lymphatic vessels within the skin, characterized by a raised, well-defined, tender, bright red rash, typically on the face or legs, but which can occur anywhere on the skin.
Chains of S. pyogenes bacteria (orange) at 900× magnification Gram stain of Streptococcus pyogenes. Unlike most bacterial pathogens, S. pyogenes only infects humans. Thus, zoonotic transmission from an animal (or animal products) to a human is rare. [8] S. pyogenes typically colonizes the throat, genital mucosa, rectum, and skin. Of healthy ...
Strep A bacteria can cause many different infections, ranging from minor illnesses to serious and deadly diseases. The bacteria are commonly found in the throat and on the skin, and some people ...
Infections caused by the Strep A bacteria can be potentially life-threatening.
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.
Layers of normal human skin. Cellulitis indicates infection in the dermis and/or subcutaneous (fat) layer. Upon the initial exposure of Streptococcus pyogenes (group A beta-hemolytic streptocci) bacteria to the skin surrounding the perianal region, the bacteria adheres to the skin's surface with filaments on its cell wall surface called adhesins.
It is typically due to either Staphylococcus aureus or Streptococcus pyogenes. [7] Risk factors include attending day care, crowding, poor nutrition, diabetes mellitus, contact sports, and breaks in the skin such as from mosquito bites, eczema, scabies, or herpes. [3] [4] With contact it can spread around or between people. [3]
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