It's not really so mysterious then, is it?
“The infected patients in Durango had all been subjected to surgeries that used spinal anesthesia in private hospitals in the sprawling state’s capital...”
“It’s not really so mysterious then, is it?”
“[Rare and severe complication of spinal anesthesia: bacterial meningitis (about a case and literature review)]”
https://pubmed.ncbi.nlm.nih.gov/28904686/
“Bacterial meningitis without pyrexia after spinal anesthasia for caesarean section: A case report”
https://pubmed.ncbi.nlm.nih.gov/34753101/