Difference between revisions of "Group B Strep and Pregnancy"

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<br>By Shawn Ruiz<br>
 
<br>By Shawn Ruiz<br>
  
<br>Group B Strep (GBS), also known as Streptococcus agalactiae, is a Gram-positive, beta-hemolytic, catalase-negative, facultative anaerobe that is a normal component of the gastrointestinal and genitourinary tracts.<ref name=aa>[https://en.wikipedia.org/wiki/Streptococcus_agalactiae]</ref>. In fact, GBS colonizes the gastrointestinal and genitourinary tracts of up to 50% of healthy adults<ref name=bb>[https://pubmed.ncbi.nlm.nih.gov/17088932/]</ref>. Most healthy adults who are colonized by GBS will not experience any symptoms or GBS-related infections. While the bacteria is usually harmless in healthy adults, it is a major cause of meningitis, pneumonia, and and sepsis in neonates<ref name=cc>[https://evidencebasedbirth.com/groupbstrep/]</ref>. Moreover, GBS is the leading infectious cause of mortality in neonates in the United States<ref name=dd>[https://www.ncbi.nlm.nih.gov/books/NBK482443/#:~:text=Preterm%20infants%20with%20early%2Donset,in%20term%20infants%5B2%5D.]</ref>. GBS causes both early onset and late onset infections in neonates, which occur during and after the first week of the neonate's life, respectively<ref name=dd/>. While early and late onset of GBS infections in neonates are possible, current intervention are only effective in preventing early-onste GBS infections<ref name=dd/>. The main risk factor for an early-onset GBS infection in a neonate is colonization of a birthing person's genital tract with Group B during labor<ref name=dd/>.
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<br>Group B Strep (GBS), also known as Streptococcus agalactiae, is a Gram-positive, beta-hemolytic, catalase-negative, facultative anaerobe that is a normal component of the gastrointestinal and genitourinary tracts<ref name=aa>[https://en.wikipedia.org/wiki/Streptococcus_agalactiae]</ref>. In fact, GBS colonizes the gastrointestinal and genitourinary tracts of up to 50% of healthy adults<ref name=bb>[https://pubmed.ncbi.nlm.nih.gov/17088932/]</ref>. Most healthy adults who are colonized by GBS will not experience any symptoms or GBS-related infections. While the bacteria is usually harmless in healthy adults, it is a major cause of meningitis, pneumonia, and and sepsis in neonates<ref name=cc>[https://evidencebasedbirth.com/groupbstrep/]</ref>. Moreover, GBS is the leading infectious cause of mortality in neonates in the United States<ref name=dd>[https://www.ncbi.nlm.nih.gov/books/NBK482443/#:~:text=Preterm%20infants%20with%20early%2Donset,in%20term%20infants%5B2%5D.]</ref>. GBS causes both early onset and late onset infections in neonates, which occur during and after the first week of the neonate's life, respectively<ref name=dd/>. While early and late onset of GBS infections in neonates are possible, current intervention are only effective in preventing early-onste GBS infections<ref name=dd/>. The main risk factor for an early-onset GBS infection in a neonate is colonization of a birthing person's genital tract with Group B during labor<ref name=dd/>.
  
  

Revision as of 01:34, 15 March 2021

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Introduction

This artistic recreation, based on scanning electron microscopy (SEM), depicts a three-dimensional (3D), computer-generated image, of a group of Gram-positive, Streptococcus agalactiae (group B Streptococcus) bacteria. Photo Credit: Alissa Eckert, who is a medical illustrator at the CDC.


By Shawn Ruiz


Group B Strep (GBS), also known as Streptococcus agalactiae, is a Gram-positive, beta-hemolytic, catalase-negative, facultative anaerobe that is a normal component of the gastrointestinal and genitourinary tracts[1]. In fact, GBS colonizes the gastrointestinal and genitourinary tracts of up to 50% of healthy adults[2]. Most healthy adults who are colonized by GBS will not experience any symptoms or GBS-related infections. While the bacteria is usually harmless in healthy adults, it is a major cause of meningitis, pneumonia, and and sepsis in neonates[3]. Moreover, GBS is the leading infectious cause of mortality in neonates in the United States[4]. GBS causes both early onset and late onset infections in neonates, which occur during and after the first week of the neonate's life, respectively[4]. While early and late onset of GBS infections in neonates are possible, current intervention are only effective in preventing early-onste GBS infections[4]. The main risk factor for an early-onset GBS infection in a neonate is colonization of a birthing person's genital tract with Group B during labor[4].




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Authored for BIOL 238 Microbiology, taught by Joan Slonczewski, 2021, Kenyon College.