Scarlet fever Scarlet fever Introduction Introduction 1 A kind of acute infectious 1 A kind of acute infectious disease of respiratory tract disease of respiratory tract 2 2 Group A Group A β-hemolytic β-hemolytic streptococcus streptococcus 3 Main 3 Main clinical manifestation: clinical manifestation: acute fever acute fever pharyngitis pharyngitis diffuse and red exanthem(ras diffuse and red exanthem(ras h) h)
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Scarlet fever Introduction 1 A kind of acute infectious 1 A kind of acute infectious disease of respiratory tract disease of respiratory tract 2 Group.
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Scarlet feverScarlet feverIntroduction Introduction 1 A kind of acute infectious1 A kind of acute infectious
disease of respiratory tract disease of respiratory tract
2 2 Group A Group A β-hemolyticβ-hemolytic
streptococcusstreptococcus
3 Main3 Main clinical manifestation:clinical manifestation:
acute fever acute fever
pharyngitis pharyngitis
diffuse and red exanthem(rash)diffuse and red exanthem(rash)
desquamation and hyperpigmentationdesquamation and hyperpigmentation
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2~3weeks later2~3weeks later
rheumatic feverrheumatic fever
glomerulonephritisglomerulonephritis
arthritisarthritis
Etiology Etiology Group A Group A β-hemolytic streptococciβ-hemolytic streptococci
1 Morphology and structure1 Morphology and structure Gram-positive spherical cocciGram-positive spherical cocci Diameter: 0.6~1.0 Diameter: 0.6~1.0 μmμm Capsule(+) flagellum and spore(-)Capsule(+) flagellum and spore(-)Streptococcus groups: A~H & K~U on the basis of Streptococcus groups: A~H & K~U on the basis of C-carbC-carb
ohydrateohydrate within the cell wall within the cell wall Group A : more than 80 immunologically distinct typeGroup A : more than 80 immunologically distinct type
s that are based on differences in the s that are based on differences in the M protein.M protein.