What type(s) of meningitis would be most likely to occur from having a blood patch or epidural?

Staph meningitis: A blood patch or epidural involves injecting the spine with a needle. Therefore, the most likely contaminant would be a bacteria on the skin, driven into the spine by the needle. Staphylococcus aureus ("staph" is the most common bacteria on the skin that is responsible for the majority of this type of infection. The incidence of meningitis after an injection is very low.

Aseptic Meningitis: Bacterial meningitis from an epidural blood patch(EBP) is rare, but does occur. Aseptic(non-infectious) meningitis is more common and apparently due to irritation of the meninges caused by the blood patch itself. The meninges are comprised of the three membranes (the dura mater, arachnoid, and pia mater) that line the skull and vertebral canal and enclose the brain and spinal cord.

Very rare: If it does occur, it is from one of the skin bacteria,

Unlikely: I have NEVER encountered any case of any type of meningitis following a "blood patch". If that would occur, would be secondary to skin bacteria, and even less likely E. coli. But why do you ask this question? Maybe there is more behind this. Do you wish to schedule Concierge visit?