Streptococcus pyogenes, Group A

Streptococcus pyogenes, Group A


General Information

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.

Post-exposure prophylaxis may be indicated.