Meningitis happens when the spinal column and brain’s lining become inflamed. This lining is called the meninges. Aseptic meningitis occurs when there are signs of meningitis. However, when a sample of brain fluid is taken, bacteria or fungi are not seen or do not grow.

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The most common causes of aseptic meningitis are:

  • Viral infection due to:
    • Enteroviruses, such as Coxsackie virus
    • Sexually transmitted disease, such as herpes and HIV
    • Other viruses, varicella/zoster, rabies, mumps, and arboviruses likeWest Nile virus
  • Parasitic infection, such as Lyme disease
  • Mycoplasma, an usual bacteria that can cause pneumonia
  • Tuberculosis
  • Bacterial meningitis that has not been fully treated
  • Autoimmune diseases, such as lupus, sarcoidosis, andBehcet’s disease
  • Cancer that has spread to the meninges
  • Infection near the spinal cord or brain
  • Certain medicines, such as ibuprofen and other non-steroidal anti-inflammatory drugs