The most common cause of<unk>  is a viral infection, specifically by enteroviruses. In fact, 90 percent of all meningitis cases that are viral are caused by enteroviruses. Other viruses that may cause<unk>  are varicella zoster virus, herpes, and mumps. Other causes may include mycobacteria, fungi, spirochetes, and complications from HIV. Side effects of certain drugs such as nonsteroidal anti-inflammatory drugs (NSAIDs), antibiotics (e.g., trimethoprim-sulfamethoxazole or amoxicillin), and antiepileptic drugs can also cause<unk> . There are multiple types of<unk>  that are differentiated based on their cause. * An example of a mumps infection. Viral meningitis * Enterovirus (EV) caused meningitis. This is the most common cause of viral meningitis, with 90% of viral meningitis cases being caused by EVs. * Human immunodeficiency virus (HIV) * Mumps meningoencephalitis * Mosquito carried viruses of the flavivirus family. Saint Louis encephalitis (SLE) and West Nile virus (WNV) are the most typical. * Specific types of Herpes can result in<unk> . These are (HSV)-1, (HSV)-2, varicella-zoster virus, and (HHV6). * Bacteria * Lyme disease * Syphilis * Leptospirosis * Fungi * Cryptococcal infection * Coccidioidal infection * Drug-induced<unk>  (DIAM) * Irritation of the meninges from drugs administered directly to the spinal canal or subarachnoid space. The hypersensitivity to the drug results in an immune response. * Autoimmune diseases * Systemic lupus erythematosus. * Cancer-caused<unk>  such as neoplastic meningitis * This affects about 5% of all cancer cases, with a predominance in leukemias. * Neurosarcoidosis
Aseptic meningitis
Fungal meningitis
Viral meningitis
Drug-induced aseptic meningitis
Herpesviral meningitis
Viral encephalitis
Tuberculous meningitis
Granulomatous meningoencephalitis