A cikin manya, Neisseria meningitidis da Streptococcus pneumoniae tare suna haifar da 80% na cututtukan meningitis na kwayoyin cuta. Hadarin kamuwa da cuta tare da Listeria monocytogenes yana ƙaruwa a cikin mutane sama da shekaru 50. 5% na haɗarin kamuwa da cuta tare da Listeria monocytogenes yana ƙaruwa a cikin mutane sama da shekaru 50 da haihuwa. Gabatar da rigakafin pneumococcal ya rage ƙimar cutar meningitis na pneumococcal a cikin yara da manya. Raunin da ya faru a cikin kwanyar kwakwalwa na iya ba da damar ƙwayoyin cuta na hanci su shiga cikin sararin meningeal. Hakazalika, na'urori a cikin kwakwalwa da meninges, kamar su cerebral shunts, drains na waje ko Ommaya reservoirs, suna ɗaukar haɗarin meningitis. A cikin waɗannan lokuta, ƙwayoyin cuta suna iya kamuwa da cutar Staphylococcus, Pseudomonas, da sauran ƙwayoyin cuta masu cutar ƙwayoyin cuta. Waɗannan pathogens suna haɗuwa da haɗarin kamuwa
Staphylococci, Pseudomonas, da sauran ƙwayoyin cuta na Gram-mara kyau