ST-17 GBS crossing of the intestinal and BBBs in a fatal case of human neonatal LOD with meningitis. Immunohistological study of the intestine and the CNS of a fatal case of ST-17 LOD. Bacteria were labeled with a specific polyclonal antibody to GBS and appear in reddish brown. Sections were counterstained with hematoxylin. GBS is present in the intestine (a and b), in meninges (c and d), in brain microvessels (e–j), as well as in choroid plexuses (k and l).