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Transcript of Streptococcus Pyogenes
They do not have an endospores
Cause mild illnesses: strep throat and impetigo
Cause severe illnesses: scarlet fever, glomerulonephritis, and necrotizing fasciitis
THE END! Cell Type Prokaryotic cell Reproduction Binary Fission Streptococcus Pyogenes Physical Characteristics Habitat Domain
Species Nutrition Heterotrophs
Pyogenes Lacks a nucleus
Single, circular chromosome
Lacks membrane bound organelles A sexual reproduction
Single parent that splits itself into identical copies of itself Life Cycle Mesophiles Streptococcus pyogenes live in habitats with moderate conditions and temperatures
Minimum: 20° C
Maximum: 40° C
Growth: 37° C
Affects: Humans, fish, cows, etc.
Blood and blood stream
Starts off on skin or in throat Takes material from environment or eats other organisms
Sometimes eats flesh, if infection is severe -> attaches to mucus and feeds off membrane on throat Chemohetertrophs Uses energy released from chemical reactions -> ammonia, hydrogen sulphide, etc. They are attached in a long line (chain), called Strepto_. They are greater then 0.5 mm in size. Anaerobic Can live with or without oxygen Streptococcus Pyogenes has a protein called protein F, which is a fibronectin binding protein that allows it to bind to the epithelial cells. By binding to the epithelial cells, the organism is able to stick to the cells of the host tightly, and not leave.
The M protein, allows it to resist phagocytosis -> allows cells to grab vital nutrients and protects body of host from harmful bacteria (vital for survival)
Hyaluronic acid capsule binds CD44 on epithelial cells