What is the onset timing of pneumonia caused by GBS?

Pneumonia caused by Group B Streptococcus (GBS) typically presents within the first week of life, making the timeframe of less than 7 days the most accurate choice. This timing relates to the underlying mechanism of GBS transmission and infection in neonates, where infants acquire the bacteria during labor and delivery, particularly if the mother is colonized with GBS.

When GBS pneumonia develops, it generally manifests shortly after birth, often within the first 48 to 72 hours, but it can extend up to about 7 days. The rapid onset reflects the challenge of the neonatal immune system and the potential for early-onset sepsis linked to GBS. Understanding this timeframe is crucial for early diagnosis, prompt treatment, and minimizing complications associated with GBS infections in newborns.