What is the appropriate gestational age to perform Group B Streptococcus culture?

The appropriate gestational age to perform Group B Streptococcus (GBS) culture is between 35 to 36 weeks. At this stage, the screening is conducted because it allows for timely identification of GBS colonization in pregnant women.

Detecting GBS around this timeframe is crucial since it provides enough time to implement preventive measures before delivery. If a woman tests positive for GBS, medical protocols typically include intrapartum antibiotic prophylaxis to reduce the risk of transmitting the bacteria to the newborn during labor and delivery, thus helping to prevent serious complications such as neonatal sepsis or meningitis.

Performing the GBS culture any earlier than 35 weeks may not accurately reflect a woman's GBS status at the time of delivery, as colonization can change throughout the pregnancy. This makes the timing of 35 to 36 weeks ideal to ensure appropriate care and minimize the risk of infection for the newborn.