Streptococcus Pyogenes

Characteristic
1. most serious
2. inhibits throat, nasopharynx, occasionally skin
3. catalase -
Virulence fc
1. Produce surface antigens
  1. C-carbohydrate
  2. fimbriae
  3. M-protein
  4. hyaluronic acid capsule
  5. C5a protease hinders com.
  6. neutrophile response
2. Extracellular toxins
  1. streptolysin
  2. pyrogenic
  3. superantigen
3. Extracellular enzymes
  1. streptokinase
  2. hyaluronidase
  3. DNase
Epidemiology & Pathogenesis
1. human reservior
2. children predominant-cutaneous & throat infec.
3. trans-ctc, droplets, fd, fomites
4. entry-skin / pharynx
Diseases
1. skin infec.
  1. impetigo
  2. erysipelas
2. throat infec.
  1. S. pharyngitis
3. systemic infec.
  1. scarlet fever
  2. septicemia
  3. pneumonia
  4. S. TSS
4. long term effect
  1. rheumatic fever
  2. acute glomerulonephritis

Resumo de Recurso

	Criado por adam94 mais de 10 anos atrás