File:Streptococccus pyogenes beta-hemolytic colonies on blood agar.jpg

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S. pyogenes produces an exotoxin called streptolysin O, which completely lyses red blood cells in the agar around the bacterial colonies. This results in a clear, transparent zone surrounding the colonies.

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Description
English: Streptococcus pyogenes, also known as Group A Streptococcus (GAS), is a significant human pathogen responsible for a wide variety of infections, from mild throat infections (pharyngitis) to severe invasive diseases like necrotizing fasciitis.
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Author Ajay Kumar Chaurasiya

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current13:37, 14 October 2023Thumbnail for version as of 13:37, 14 October 20233,264 × 2,448 (1.58 MB)Ajay Kumar Chaurasiya (talk | contribs)Uploaded own work with UploadWizard

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