Causes of bacterial meningitis in adults B Community Nosocomial Streptococcus pneumoniae 38 8 Gram-negative bacilli Neisseria meningitidi 14 Listeria spp. 3 Streptococci 7 12 Listeriosis/Listeria Staphylococcus aureus 5 9 Haemophilus influenzae 4 Staphylococcal/ 9% Meningococcal/ Unspecified bacterium/ Meningocoque Bacterie non precise 6% 37% Streptococcal/ Pneumococcal/ Pneumocoque 21%Causes of bacterial meningitis in adults