The test for b strep will have a test value and a reference value, and a test value lower than the reference value usually indicates that there is no infection in the body. Generally, there will be a test for b streptococcus during the pregnancy checkup, and the test and reference values will be shown on the test form, or a negative or positive result will be given directly. If the test result is lower than the reference value, it is negative and there is no b streptococcus infection in the body. If the result is higher than the reference value it is positive, indicating that there is a group b streptococcus infection in the body. Streptococcus b is an anaerobic bacterium that normally resides in the rectum and vagina of the human body. Normally, infection with Streptococcus b does not cause disease in normal healthy people. However, when a pregnant woman is infected with Streptococcus b, it may be passed on to her newborn during labor and delivery, causing the newborn to become infected. Therefore, pregnant women with b streptococcus infections usually need to be treated to avoid infection in their newborns. When the laboratory test for b streptococcus shows a positive result, the pregnant woman needs to consult a doctor and actively cooperate with the doctor’s treatment.