name some bacterial pathogens which cause this disease.
Viral, fungal and parasitic
Meningitis
Viruses that cause meningitis include enteroviruses, herpes simplex virus (generally type 2, which produces most genital sores; less commonly type 1), varicella zoster virus (known for causing chickenpox and shingles), mumps virus, HIV, LCMV, Arboviruses (acquired from a mosquito or other insect), and the Influenza virus. 
which layer of meninges is affected in meningitis The three membranes - pia mater, arachnoid mater and dura mater can you tell me something about the first one mentioned above? It is the delicate innermost layer of the meninges, the membranes surrounding the brain and spinal cord. can you tell me something about the second layer mentioned? It is a derivative of the neural crest mesectoderm in the embryo. and the last layer? It is the outermost of the three layers of membrane called the meninges that protect the central nervous system. what are the causes for this disease? It is typically caused by an infection with microorganisms. what are the symptoms? Fever, headache, and neck stiffness.
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Meningitis [SEP] Viral
Viruses that cause meningitis include enteroviruses, herpes simplex virus (generally type 2, which produces most genital sores; less commonly type 1), varicella zoster virus (known for causing chickenpox and shingles), mumps virus, HIV, LCMV, Arboviruses (acquired from a mosquito or other insect), and the Influenza virus. Mollaret's meningitis is a chronic recurrent form of herpes meningitis; it is thought to be caused by herpes simplex virus type 2.