Streptococcus, Group B    (2018 Data)

Antibiotic
% Susceptible
 
Antibiotic
% Susceptible
Ampicillin
100
  Imipenem
+
Azithromycin
43
  Levofloxacin
100
Aztreonam
-
  Meropenem
+
Cefazolin
100
  Moxifloxacin
+
Cefepime
+
  Nitrofurantoin
&
Ceftazidime
+
  Oxacillin/Naf
+
Ceftriaxone
100
  Penicillin
99
Cefuroxime
+
  Piperacillin
+
Ciprofloxacin
+/-
  Piperacillin/tazo
+
Clarithromycin
+
  Ticarcillin/Clav
+
Clindamycin
55
  Tobramycin
-
Doxycycline
-
  TMP/SMX
-
Erythromycin
+/-
  Unasyn/Aug
+
Gentamicin
-
  Vancomycin
100
 
   

Number of isolates tested: 91

Comments:   Beta streptococci remain reliably susceptible to beta lactam antibiotics including penicillin

For historical susceptibility data click here

Numeric data represent local susceptibility data.
(+) = usually effective or >60% susceptible; (+/-) = clinical trials lacking or 30-60% susceptible; (-) = not effective clinically or <30% susceptible - Adapted with permission from The Sanford Guide to Antimicrobial Therapy
(*) Local (non-Sanford Guide) opinion
(S) = synergistic with penicillin/ampicillin;
(&) nitrofurantoin only useful for lower tract urinary tract infections