Ankle Brachial Index. The Ankle Brachial Index (ABI) is the systolic pressure at the ankle, divided by the systolic pressure at the arm. It has been shown to be a specific and sensitive metric for the diagnosis of Peripheral Arterial Disease (PAD).
Group B streptococcus (group B strep) is a type of bacteria that causes infection among newborns, pregnant women or women after childbirth, females after gynecologic surgery, and older male and female patients with other serious diseases.roup B streptococcus (group B strep) is a type of bacteria that causes infection among newborns, pregnant women or women after childbirth, females after gynecologic surgery, and older male and female patients with other serious diseases.
By Mayo Clinic Staff. The group B strep test is done during pregnancy to identify women who carry this common bacterium. Group B strep is usually harmless in adults. Rarely, however, group B strep can cause health problems during pregnancy, including: 1  Urinary tract infection.  Infection of the placenta and amniotic fluid (chorioamnionitis)