There was a case report on that recently:
"On suspicion of MS, a spinal fluid examination was performed in May 2022, which showed eight mononuclear cells, elevated IgG index and oligoclonal bands. Finally, a positive intrathecal Borrelia antibody index was found."
See here:
https://www.healingwell.com/community/default.aspx?f=30&m=4342269