Antimicrobial susceptibility of viridans group streptococci

Diagn Microbiol Infect Dis. 1997 Dec;29(4):277-80. doi: 10.1016/s0732-8893(97)00140-5.

Abstract

A total of 68 viridans group streptococci, including 31 Streptococcus sanguis, 12 S. mitis, 3 S. salivarius, and 8 S. milleri from blood, and an additional 14 S. milleri from abscesses and normally sterile sites, were tested against penicillin, amoxicillin, cefazolin, ceftriaxone, meropenem, clindamycin, quinupristin/dalfopristin, rifampin, levofloxacin, ofloxacin, vancomycin, and gentamicin with the microdilution method. The susceptibility rates for S. sanguis were: penicillin, 74%; amoxicillin, 84%; ceftriaxone, 94%; clindamycin, 87%, and vancomycin, 100%. The susceptibility rates for S. mitis were: penicillin, 42%; amoxicillin, 67%; ceftriaxone, 58%; clindamycin, 100%; and vancomycin, 100%. The susceptibility rates for S. milleri were: penicillin, 100%, amoxicillin. 100%; ceftriaxone, 100%, clindamycin, 100%; and vancomycin, 100%. Two of the three isolates of S. salivarius were susceptible to penicillin, amoxicillin, and ceftriaxone; all were susceptible to clindamycin and vancomycin. Levofloxacin, quinupristin/dalfopristin, and rifampin were highly active against all isolates.

MeSH terms

  • Amoxicillin / pharmacology
  • Anti-Bacterial Agents / pharmacology*
  • Anti-Bacterial Agents / therapeutic use
  • Cefazolin / pharmacology
  • Ceftriaxone / pharmacology
  • Clindamycin / pharmacology
  • Drug Resistance, Microbial
  • Gentamicins / pharmacology
  • Humans
  • Levofloxacin
  • Meropenem
  • Microbial Sensitivity Tests
  • Ofloxacin / pharmacology
  • Penicillins / pharmacology
  • Rifampin / pharmacology
  • Streptococcal Infections / drug therapy*
  • Streptococcal Infections / microbiology
  • Streptococcus / drug effects*
  • Streptococcus / pathogenicity
  • Thienamycins / pharmacology
  • Vancomycin / pharmacology
  • Virginiamycin / pharmacology

Substances

  • Anti-Bacterial Agents
  • Gentamicins
  • Penicillins
  • Thienamycins
  • Virginiamycin
  • quinupristin-dalfopristin
  • Clindamycin
  • Levofloxacin
  • Vancomycin
  • Ceftriaxone
  • Amoxicillin
  • Ofloxacin
  • Meropenem
  • Cefazolin
  • Rifampin