Three-dimensional (3D) computer-generated image of a group of Clindamycin-resistant Group-B Streptococcus (GBS), also known as S. agalactiae, bacteria, which were arranged in chains. The artistic recreation was based upon scanning electron micrographic imagery. If you look carefully, you'll be able to see a number of these organisms undergoing the process of cell division along the long axis of their respective chains. Group-B Streptococcus (GBS) is a type of bacteria that can cause severe illnesses in people of all ages, ranging from bloodstream infections (sepsis) and pneumonia, to meningitis and skin infections. GBS is sometimes found in the digestive, urinary, and reproductive tracts. Most of the time, we don't need to worry about group-B strep-but if you're pregnant, it can cause serious problems for your newborn.