Streptococcus pyogenes, Group A

Streptococcus pyogenes, Group A


See 'Additional Information'


General Information

Penicillin or amoxicillin

Gram positive cocci in chains, beta-hemolytic

Reservoir is human skin and oropharynx/mucous membranes.

Person-to-person transmission.

Occasionally foodborne.

Exhaustive and fascinating list.

Most common manifestations are:

  •  Tonsillopharyngitis ("Strep throat")
  •  Skin infections (impetigo, erysipelas, cellulitis)

Other invasive infections:

  • Bacteremia
  • Endocarditis
  • Necrotizing fasciitis
  • Meningitis
  • Toxic shock syndrome
  • Pneumonia
  • Other sterile space infections.

Post-infectious immunologically mediated phenomena such as glomerulonephritis and rheumatic fever.

Scarlet fever.

Standard and droplet precautions for invasive disease for the first 24hrs of antimicrobial therapy or after last debridement, otherwise no precautions.