Please confirm topic selection

Are you sure you want to trigger topic in your Anconeus AI algorithm?

Please confirm action

You are done for today with this topic.

Would you like to start learning session with this topic items scheduled for future?

Updated: Mar 31 2022

Streptococcus agalactiae (Group B Streptococci)

Images classification - moises.jpg
  • Snapshot
    • A 29-year-old woman at 36-weeks gestation presents to her obstetrician for a prenatal visit. She denies any bloody vaginal fluid production and endorses the presence of spontaneous fetal movement. Ultrasonography demonstrates infant size that is appropriate for gestational age. She undergoes a rectal and vaginal swab, which grows group B streptococci. Preparations are made to receive intrapartum penicillin G prophylaxis.
  • Introduction
    • Classification
      • gram-positive cocci that are
        • β-hemolytic
        • produces CAMP factor
          • an extracellular substance produced by that enlarges the area of hemolysis formed by Staphylococcus aureus
        • catalase-negative
        • facultative anaerobe
        • bacitracin resistant
        • hippurate test positive
        • PYR negative
    • Reservoir
      • vagina and gastrointestinal tract
    • Prevention
      • at 35-37 weeks gestation, a rectal and vaginal swab is performed to determine the presence of group B streptococcus (GBS)
        • if the cultures return positive for GBS, patients receive intrapartum penicillin G or ampicillin prophylaxis
    • Pathogenesis
      • infection occurs in utero secondary to
        • intraamniotic infection
        • rupture of membranes
        • passage through the vagina
    • Associated conditions
      • neonatal meningitis
      • neonatal sepsis
      • neonatal pneumonia
  • Presentation
    • Symptoms/physical exam
      • neonatal septicemia
        • irritability
        • lethargy
        • respiratory distress (e.g., tachypnea, hypoxia, and grunting)
      • neonatal meningitis
        • irritability
        • lethargy
        • respiratory distress (e.g., tachypnea, hypoxia, and grunting)
        • poor feeding and vomiting
        • bulging fontanel
        • nuchal rigidity
      • neonatal pneumonia
        • respiratory distress (e.g., tachypnea, hypoxia, and grunting)
          • patients will have a diffuse alveolar pattern on chest radiography
  • Studies
    • GBS isolation from a sterile body site (e.g., blood and cerebrospinal fluid)
  • Differential
    • Neonatal meningitis by other organisms (e.g., E. coli and L. monocytogenes)
      • differentiating factors
        • E. coli
          • gram-negative
        • L. monocytogenes
          • gram-positive rod
  • Treatment
    • Medical
      • penicillin G
        • indication
          • treatment of choice after GBS has been confirmed to be the only organism causing infection in the neonate and infant
1 of 0
1 of 1
Private Note

Attach Treatment Poll
Treatment poll is required to gain more useful feedback from members.
Please enter Question Text
Please enter at least 2 unique options
Please enter at least 2 unique options
Please enter at least 2 unique options