Streptococcus pyogenes, Group A

Question 1

Streptococcus pyogenes, group A are what kind of bacteria?

Answer 1

Gram-positive coccus in chains

Question 2

Streptococcus pyogenes, group A have what type of colonies?

Answer 2

Beta hemolytic colonies- referred to as “group A beta Streptococcus” (consist of several antigenic types.

Question 3

Streptococcus pyogenes, group A is the etiological agent of?

Answer 3

Skin & tissue infections
Necrotizing fasciitis
Acute exudative pharyngitis
Post streptococcal complications

Question 4

Streptococcus pyogenes, group A examples of skin & tissue infections.

Answer 4

Impetigo
Cellulitis
Erysipelas
Along with Staphylococcus aureus causes about 90% of these skin infections.

Question 5

What is Streptococcus pyogenes, group A scarlet fever?

Answer 5

Skin rash due to erythrogenic toxin. Ab to toxin prevents rash in future infections.

Question 6

What are some examples of Streptococcus pyogenes, group A necrotizing fasciitis?

Answer 6

Streptococcal gangrene
Invasive cellulitis, “flesh eating bacteria”
Streptococcal Toxic Shock Syndrome

Question 7

Streptococcus pyogenes, group A, Necrotizing fasciitis causes what invasion of the tissue?

Answer 7

Acute toxic and necrotic invasion of tissue- super- antigen effects.

Question 8

Streptococcus pyogenes, group A, necrotizing fasciitis is characterized by what?

Answer 8

The rapid destruction of muscle and fat tissue with high fever and prominent pain; highly invasive and life threatening.

Question 9

What is the treatment for Streptococcus pyogenes, group A, Necrotizing fasciitis?

Answer 9

Aggressive antimicrobic therapy (penicillin) and surgical intervention (debridement of affected tissue to remove toxin).