What is the benefit of screening for B streptococcus bacteria during pregnancy?

Pregnant women who have a greater risk of infecting their baby with group B streptococcus are given an antibiotic during labor. This is done to protect the baby from . It’s not clear whether it makes sense to routinely screen for group B streptococcus in all pregnant women.
Routine tests are carried out during pregnancy to see whether the baby is developing normally and the mother is healthy. These tests include ultrasound scans and blood tests, as well as urine tests. In Germany, special guidelines (“Mutterschafts-Richtlinien”) specify what is to be tested in pregnancy, and what sorts of tests are used.
If doctors think that a pregnant woman carries group B streptococcus in her body, she is given an antibiotic during labor. This is done to prevent the baby from being infected and becoming very ill.