@misc{10481/112333, year = {2026}, month = {3}, url = {https://hdl.handle.net/10481/112333}, abstract = {A 48-year-old woman was diagnosed with multiple sclerosis (MS) in 2019. She participated with blood and cerebrospinal fluid samples as a spinal anaesthesia surgery patient for a case–control study on viruses and MS in 2003. The study had already demonstrated intrathecal antibody synthesis (ITS) to Epstein-Barr virus (EBV) but not against measles, rubella and varicella-zoster (MRZ) reaction viruses in this individual at the time of recruitment. A 2025 study review established that she was the only patient in her control subgroup who also developed MS. This case shows that a specific EBV-ITS may be an early indicator of a ‘biologically isolated syndrome’ in MS.}, publisher = {Sage Journals}, keywords = {Multiple sclerosis}, keywords = {Epstein-Barr virus}, keywords = {Intrathecal antibody synthesis}, title = {Intrathecal synthesis of Epstein-Barr virus antibodies 15 years before onset of multiple sclerosis}, doi = {10.1177/13524585261427398}, author = {Guerrero Fernández, Manuel Miguel and Serrano Álvarez, Carmen and Fonronda Bengoa, Jesús and Barrero Hernández, Francisco Javier and Sorlozano Puerto, Antonio}, }