The amount of a alpha-2,8-sialyltransferase 8F (human) when measured in cerebrospinal fluid. The trait is Ontology of Biological Attributes entry OBA_2058285 (level of alpha-2,8-sialyltransferase 8F (human) in cerebrospinal fluid). Also known as: cerebrospinal fluid alpha-2,8-sialyltransferase 8F (human) amount.