Meningitis just means inflammation of the meninges. Various bacteria are blamed for meningitis - H. influenza B, pneumococcal, meningococcal & more (ref)
Bacterial Meningitis
1. Meningococcal. (Strains: A,
B, C, Y, W-135, 29E etc) Vaccines:
Meningitis
A & C
2. Pneumococcal. (Strains:
1,2,3,4,5,6B, 7F,8, 9N etc) Vaccines:
Pneumococcal
3. Haempohilus influenzae/Hib
(Strains: B,E,F etc) Vaccines:
Hib/Hemophilus
Viral or Aseptic Meningitis
The commonest causes or viral meningitis are coxsackie and echovirsuses (known as enteroviruses). It can also develop as a result of infection with herpes simplex, measles, polio or chickenpox. Or drugs.
See: Drug Induced Meningitis (DIAM)