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Table 1 Number of meningitis cases by aetiology and origin of the infection, 2001–2005, Lazio, Italy.

From: Incidence of bacterial meningitis (2001–2005) in Lazio, Italy: the results of a integrated surveillance system

   Community acquired Hospital infection HIV-related
Aetiological agent Total n % n % n %
Pneumococcus 221 208 24,6 12 16,2 2 7,7
Meningococcus 161 152 18,0 6 8,1 3 11,5
Tuberculosis 82 66 7,8    16 61,5
Streptococcus spp.* 62 51 6,0 11 14,9   
Staphylococcus spp. 59 48 5,7 10 13,5 1 3,8
Haemophilus 46 43 5,1 3 4,0   
Listeria 28 25 3,0 2 2,7 1 3,8
Salmonella 2 2 0,2     
Other bacteria specified 39 33 3,9 5 6,8 1 3,8
Other bacteria NOS 83 67 7,9 14 18,9 2 7,7
Unknown 161 150 17,8 11 14,9   
Total 944 845 100,0 74 100,0 26 100,0
  1. * except Streptococcus pneumoniae