Ampicillin susceptibilities of vaginal and placental isolates of group B streptococcus and Escherichia coli obtained between 1992 and 1994

Antimicrob Agents Chemother. 1997 May;41(5):1173-4. doi: 10.1128/AAC.41.5.1173.

Abstract

Vaginal group B streptococcus (GBS) and Escherichia coli isolates were tested for their susceptibilities to ampicillin. All 414 GBS isolates tested were susceptible to ampicillin; the MIC at which 90% of the isolates were inhibited (MIC90) was 0.125 microg/ml, and the range was 0.06 to 0.25 microg/ml. The MIC50 for the 342 E. coli isolates tested was 4.0 microg/ml, and 27% were resistant to ampicillin.

Publication types

  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Adult
  • Ampicillin / pharmacology*
  • Ampicillin Resistance*
  • Escherichia coli / drug effects*
  • Escherichia coli / isolation & purification
  • Female
  • Humans
  • Infant, Newborn
  • Microbial Sensitivity Tests
  • Penicillins / pharmacology*
  • Placenta / microbiology*
  • Streptococcus agalactiae / drug effects*
  • Streptococcus agalactiae / isolation & purification
  • Vagina / microbiology*

Substances

  • Penicillins
  • Ampicillin