National Center for Biotechnology Information NCBI NLM MEDLINE humans pubmed abstract nih national institutes of health national library of medicine adult female male aged middle aged young adult Comparative Study risk factors 80 and over Retrospective Studies cross infection* / diagnosis cross infection* / epidemiology pmid:28975609 doi:10.1111/jgs.15099 chanunya srihawan onaizah habib rodrigo hasbun cerebral ventriculitis* / diagnosis cerebral ventriculitis* / epidemiology cerebral ventriculitis* / therapy cross infection* / therapy meningitis* / diagnosis meningitis* / epidemiology meningitis* / therapy