Streptococcus B screening usually refers to Group B Streptococcus Screening, which is normally done for pregnant women. The screening for Group B Streptococcus Screening involves taking the lower third of the vagina and perianal secretions for examination, and is used to screen pregnant women for Streptococcus B infections. Group B streptococcus infections are associated with urethritis, cystitis, neonatal infections, neonatal severe pneumonia, intrauterine infections, and puerperal infections in pregnant women, so screening is done at 35 to 37 weeks of pregnancy to be able to observe whether a pregnant woman is infected with group B streptococcus. For patients with a positive screening test or or a previous history of neonatal group B streptococcal infection, or for those who have group B streptococcal bacteriuria in the current pregnancy, prophylactic antibiotics against group B streptococcus are recommended in the case of preterm rupture of membranes or after labor has entered the labor process.