Vaginal-rectal colonization with group A streptococci in late pregnancy

Infect Dis Obstet Gynecol. 2000;8(5-6):217-9. doi: 10.1155/S1064744900000302.


Objective: To determine the vaginal-rectal colonization rate with group A streptococci in late pregnancy.

Methods: All patients delivering at a northern New England hospital over a 38 month period had 35-37 week vaginal-rectal swabs cultured for group A and group B streptococci, using selective media and slide agglutination.

Results: Six thousand nine hundred forty-four screening cultures were obtained. Among these 1,393 were positive for group B streptococci and 2 for group A streptococci, yielding colonization rates of 20.1% and 0.03%, respectively.

Conclusions: Vaginal-rectal colonization with group A streptococci is rare, arguing against the need for establishing group A streptococcal screening programs in pregnancy. An approach for managing this uncommon finding is presented.

MeSH terms

  • Agglutination
  • Carrier State / epidemiology*
  • England
  • Female
  • Humans
  • Pregnancy
  • Pregnancy Complications, Infectious / epidemiology*
  • Pregnancy Trimester, Third
  • Rectum / microbiology*
  • Streptococcal Infections / epidemiology*
  • Streptococcus pyogenes / isolation & purification*
  • Vagina / microbiology*