Gram positive cocci in chains, beta-hemolytic.
Common inhabitants of human gastrointestinal tract and genitourinary tract.
Major cause of perinatal infections, including bacteremia, endometritis, chorioamnionitis.
UTI in pregnant women, systemic and focal infections in neonates and young infants.
Can also cause systemic infection in immunocompromised adults, and those 65 years and older.
Carriage is screened by vaginal/rectal swab at 34-36 weeks gestation.