Treatment of Group B Streptococcal Urinary Tract Infections

First-Line Treatment Options

Penicillin G is the preferred treatment for GBS infections due to its narrow spectrum of activity and high efficacy, as recommended by clinical guidelines 1, 2
Complete the full prescribed course of antibiotics to ensure complete eradication and prevent recurrence, as emphasized by clinical guidelines 2

For patients with penicillin allergy who are not at high risk for anaphylaxis, cefazolin or cephalexin is the preferred alternative, according to clinical guidelines 1, 2
For patients at high risk for anaphylaxis, treatment options include clindamycin (if the isolate is confirmed susceptible) or vancomycin (for severe infections or when susceptibility results are unavailable), as recommended by clinical guidelines 1, 2

Susceptibility testing should be performed on GBS isolates from penicillin-allergic patients at high risk for anaphylaxis, as advised by clinical guidelines 2
Testing for inducible clindamycin resistance is necessary for isolates that are susceptible to clindamycin but resistant to erythromycin, according to clinical guidelines 2
Approximately 20% of GBS isolates are resistant to clindamycin, so susceptibility testing should always be performed before using this antibiotic, as recommended by clinical guidelines 1

Women with GBS bacteriuria in any concentration during pregnancy should receive intrapartum antimicrobial prophylaxis during labor to prevent early-onset neonatal GBS disease, as recommended by the Centers for Disease Control and Prevention (CDC) 3
In the absence of GBS urinary tract infection, antimicrobial agents should not be used before the intrapartum period to treat asymptomatic GBS colonization, according to the CDC 3

Underdosing or premature discontinuation of therapy may lead to treatment failure or recurrence, as warned by clinical guidelines 2
Failure to consider local resistance patterns when selecting empiric therapy could lead to treatment failure, as cautioned by clinical guidelines 2