Treatment for Group B Strep UTI in a Breastfeeding Mother

First-Line Treatment Options

The American College of Obstetricians and Gynecologists recommends treating GBS urinary tract infection with standard oral antibiotics, such as amoxicillin 500 mg every 8 hours or penicillin VK 500 mg every 6 hours for 7-10 days, which are safe during breastfeeding 1, 2

For patients with non-severe penicillin allergy, the Centers for Disease Control and Prevention recommends cephalosporins, such as cephalexin 500 mg every 6 hours, as the preferred alternative 1, 2
For patients at high risk for anaphylaxis, the Centers for Disease Control and Prevention recommends clindamycin 300-450 mg every 6 hours orally, but only if susceptibility testing confirms the isolate is susceptible 1

The Centers for Disease Control and Prevention recommends that any concentration of GBS bacteriuria during pregnancy requires both immediate treatment of the UTI and intrapartum antibiotic prophylaxis during labor, regardless of whether the UTI was treated earlier in pregnancy 1, 2, 3
The patient will need intrapartum prophylaxis even if the UTI is successfully treated now, because GBS bacteriuria indicates heavy genital tract colonization 1, 3

The American College of Obstetricians and Gynecologists recommends against underdosing or allowing premature discontinuation of therapy, as this leads to treatment failure and recurrence 1, 2
The Centers for Disease Control and Prevention recommends against forgetting intrapartum prophylaxis if the patient is pregnant, as failure to provide this increases the risk of early-onset neonatal GBS disease 1, 3
The Centers for Disease Control and Prevention recommends against attempting to "decolonize" the patient with prolonged antibiotic courses outside of treating active infection, as this is ineffective and harmful 1, 3, 4