Starfleet Medical Database

Starfleet Medical Database or Medical library is a nexus of information on diseases and illnesses encountered by Starfleet, including transporter psychosis, Symbalene blood burn and Terellian Death Syndrome. The database was fully searchable via a starship library computer and contained information on both symptoms and treatment. All Starfleet personnel had access to the database.

Lieutenant Reginald Barclay often used the database to self-diagnose himself before consulting a real doctor, much to the dismay of USS Enterprise (NCC-1701-D) chief medical officer Beverly Crusher. 

Doctor Julian Bashir checked the medical library because of the aphasia virus Chief Miles O'Brien suffered from in 2369.