Strep agalactiae
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Bacteria - Gram Positive
- Staph aureus: Overview
- Staph aureus: Presentation
- Methicillin-Resistant Staph aureus (MRSA)
- Staph saprophyticus
- Strep pneumoniae: Overview
- Strep pneumoniae: Presentation
- Strep viridans
- Strep pyogenes: Overview
- Strep pyogenes: Presentation
- Strep agalactiae
- Strep bovis
- Enterococcus
- Bacillus anthracis
- Bacillus cereus
- Clostridium tetani
- Clostridium perfringens
- Clostridium botulinum
- Clostridium difficile
- Corynebacterium diphtheriae
- Listeria monocytogenes
- Nocardia
- Actinomyces
Streptococcus agalactiae
- Also known as Group B streptococcus
- Characteristics
- Gram + cocci
- Catalase negative
- First-test; determines staph (catalase positive) vs. strep
- Beta-hemolytic
- Second test; determines subtype of strep or enterococci
- PYR –
- Third test; used to rule out strep pyogenes (PYR+)
- Bacitracin-resistant
- Third test; also used to rule out strep pyogenes (PYR+), although bacitracin is not specific so it is less commonly used than PYR.
- Produces CAMP factor = enlarges hemolysis by S aureus
- CAMP stands for Christie-Atkins-Munch-Peterson
- Note: this is NOT cAMP!!
- CAMP factor synergistically enhances action of beta-lysin produced by S. aureus, to increase area of hemolysis
- CAMP stands for Christie-Atkins-Munch-Peterson
- Hippurate test +
- Facultative anaerobe
- Presentation
- Part of normal gastrointestinal and urogenital flora
- pneumonia, meningitis, and sepsis
- mainly in neonates
- Transmitted during vaginal delivery from mother to neonates
- Screen and Treat pregnant moms at 35-37 weeks of gestation
- Using rectal and vaginal swabs
- If positive → prophylaxis with penicillin
- Treatment
- Penicillin G
- Penicillin G is the antibiotic of choice for this organism in both the colonized mother and the infected infant
- Penicillin G