SESIÓN 12 STREPTOCOCCUS. Flashcards

•Describirá las características estructurales y fisiológicas de Streptococcus agalactie. •Describirá los factores de virulencia que intervienen en la patogenia e inmunidad. •Mencionará los aspectos epidemiológicos. •Describirá los cuadros clínicos producidos por estos microorganismos. •Mencionará los métodos diagnósticos de laboratorio. •Mencionará el tratamiento, prevención y control. •Mencionará los otros estreptococos beta-hemolíticos y sus características generales. •Describ

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1
Q

What grouping of Streptococcus does S. aglactie belong to?

A

-Group B

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2
Q

Describe the Biology of S. agalactie

A
  • Rapidly growing G(+) cocci arranged in chains; Group B carbohydrate and type-specific capsular carbohydrates (Ia, Ib, II-VIII)
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3
Q

What is the virulence factor of S. agalactie?

A
  • Determined primarily by the ability to avoid phagocytosis (mediated by capsule) [until the patient develops type-specific antibodies].
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4
Q

What are the disease that S. agalactie causes?

A
  • Meningitis, pneumonia, bacteremia
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5
Q

What is the reservoir for S. agalactie?

A
  • Human vagina tract (15-20% of women), gastrointestinal tract
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6
Q

What are 5 distinguishing features of S. agalactie?

A
  • Beta-hemolytic, bacitracin resistant, Hydrolyze hippurate, cAMP test positive, catalase negative.
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7
Q

What is the treatment for S. agalactie?

A
  • Penicillin G (with aminoglycosides on patients with serious infections)
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