Diagnosis

After you give birth, if your doctor suspects your baby has group B strep disease, a sample of your baby's blood or spinal fluid will be sent to a lab for evaluation.

If your baby appears ill, he or she might be given other tests, including:

• Urine culture
• Lumbar puncture
• Chest X-ray

For adults who are diagnosed with an infection, a blood test can determine if group B strep is the cause. Identifying the cause may be important for determining the appropriate treatment.