Information for Providers

Information focused on providers
The information here should help providers better understand how to manage recurrent viral meningitis (Mollaret’s).


What is Recurrent Viral Meningitis (Mollaret's)?

Recurrent viral meningitis (Mollaret’s Meningitis) is a rare form of recurrent meningitis believed to be caused by herpes viruses and other closely related viruses.

“Recurrent meningitis is defined by at least two episodes of meningitis with associated CSF pleocytosis with no symptoms between episodes. Recurrent meningitis was first described in the 1940s by physician-scientist Pierre Mollaret, who noted a handful of cases of recurrent acute aseptic meningitis with CSF showing evidence of lymphocytic and mononuclear pleocytosis. This was later attributed to HSV-2 infection. The condition was later named Mollaret meningitis after him and the “Mollaret cells” he identified, although it is now known that many of the infectious and noninfectious etiologies of chronic meningitis can occur in a fluctuating pattern consistent with a recurrent meningitis. While triggers for recurrent viral meningitis are unclear, significant risk factors should be investigated in those who present with recurrent bacterial meningitis, including host factors such as anatomic defects that provide a nidus for bacterial CNS invasion (eg, skull-base defects, neural tube defects) and acquired and congenital immunodeficiencies that predispose individuals to recurrent ear, nose, and throat infections. Likewise, recurrent meningitis due to fungi or parasites should trigger an investigation for an underlying immunocompromised state or ongoing environmental exposures. This should go beyond testing for HIV and should include evaluation of T-cell and B-cell profiles, complement levels, IgG subclass quantification, and screening for rheumatologic conditions. Recently an association between acute meningoencephalitis infection and positive paraneoplastic antibodies in recurrent meningitis cases was identified, although further studies are required to determine the significance of autoimmune antibodies in recurrent meningitis.”1

Patient Perspective


Causative Viruses

In surveys of our members in 2018, the reported causative viruses from patient diagnosis were (in order of most to least common):

  1. Herpes Simplex Virus – Type 2 (HSV-2/HHV-2)
  2. Unknown
  3. Herpes Simplex Virus – Untyped
  4. Herpes Simplex Virus – Type 1 (HSV-1HHV-1)
  5. Varicella Zoster Virus (HHV-3)


In those surveys the reported methods of diagnosis were (in order of most to least common):

  1. Lumbar puncture (with and without PCR)
  2. Medical History
  3. Blood test
  4. Physical Exam

Lumbar puncture with polymerase chain reaction (PCR) is the most widely used method for confirming recurrent viral meningitis to date.  Both documented in literature and from our experience, the most beneficial time frame to get an accurate result is 24-48 hours after symptom onset without any treatment for the virus.  If treatment is given, then the odds of getting a positive result diminish significantly.

There are also many different terms for this disease in the medical community.  The name originally used was Mollaret’s meningitis after Pierre Mollaret, but current trends in the medical field are moving away from individuals’ names toward more descriptive names for a particular disease.  The current name for this disease in ICD-11 is “Benign Recurrent Meningitis”. The current names for other types of meningitis are herpes simplex meningitis, varicella meningitis, zoster meningitis, etc. Additionally, some of the most common diagnostic terms given to members within our organization include:

  • Mollaret’s meningitis
  • Recurrent aseptic meningitis
  • Recurrent meningitis
  • Benign recurrent aseptic meningitis
  • Recurrent benign lymphocytic meningitis
  • Recurrent benign aseptic meningitis
  • Benign recurrent meningitis
  • Benign recurrent endothelial meningitis
  • Benign Multirecurrent Endothelioleukocytal Meningitis

As you can see, eliminating differences in diagnostic terminology may clarify some confusion surrounding this disease.

Long-term Effects

Contrary to research which describes this disease as “self-limiting”, we have found that recurrent viral meningitis can be very disabling. In our 2018 survey, in which we asked members how recurrent meningitis affects their lives, only 38% of respondents said their presentation of the disease was truly recurrent with full recovery after each episode, 30% reported chronic symptoms of meningitis, and 27% report experiencing both chronic and acute forms.

Regarding specific experiences, our members were asked to list their long-term symptoms which they felt could be attributed to the onset of recurrent meningitis. Listed below are the most commonly reported symptoms (in order of most to least common).

  1. Memory problems
  2. Fatigue
  3. Headache
  4. Concentration issues
  5. Brain Fog
  6. Balance Issues
  7. Sensitivity to sound
  8. Eyesight changes
  9. Dizziness
  10. Nerve pain in extremities

More research is needed to fully elucidate the long-term effects of recurrent meningitis.

Medical Treatments

Medications most used to treat this disease are Acyclovir and Valacyclovir.  Most commonly, when patients present with severe symptoms, either IV Acyclovir is administered or a PICC line is inserted and the patient is instructed to treat at home for two weeks. Outside of active infection, many of our members follow long-term Acyclovir and Valacyclovir regimens in order to suppress viral reactivation.  Recent research suggests success by treating with Indomethacin as well.₂ Additionally, because some patients have negative reactions to the antivirals, Lysine and other supplements have been helpful in managing symptoms.

Natural/Alternative Treatments

The most common helpful non-invasive treatments used by our members are (in order):

    1. Avoidance of stress
    2. Extra sleep
    3. Massage

    The most common supplements used by our members are (in order):

    1. Lysine
    2. Magnesium
    3. Vitamin C
    4. Vitamin B12


Completed research was performed at Aarhaus University in Denmark that helps to better understand the cause of recurrent viral meningitis.  Below is information provided by the investigators:

Identification of novel innate immunodeficiencies in patients with HSV-2 Mollaret’s meningitis
Dr. Alon Schneider Hait, M.D, Ph.D fellow
Supervision: Prof. Trine H. Mogensen
Department of Infectious diseases, AUH
Department of Biomedicine, Faculty of Health
Aarhus, Denmark

This study represents the first autophagy defect causing a primary immunodeficiency with increased susceptibility to viral infection described in humans which altogether suggests an important role for autophagy in anti-HSV2 immunity in the CNS.

Full free article can be found here:  Mutations in LC3B2 and ATG4A underlie recurrent HSV2 meningitis and reveal a critical role for autophagy in antiviral defense in humans


Recurrent Meningitis Causes

Behcet’s disease

Behcet’s Disease, also known as Behcet’s syndrome, is a rare, chronic, autoimmune, autoinflammatory disorder of unknown origin.

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Granulomatosis with Polyangitis

Granulomatosis with polyangiitis (GPA/formerly called Wegener’s granulomatosis) is systemic, meaning that the effect of inflammation can be present in the entire body.  It affects the upper (sinuses and nose), and lower (lungs), respiratory system and frequently involves the kidneys, lungs, eyes, ears, throat, skin and other body organs.

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Rheumatoid Arthritis

Rheumatoid arthritis (RA) is an autoimmune disease in which the body’s immune system – which normally protects its health by attacking foreign substances like bacteria and viruses – mistakenly attacks the joints.

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Sarcoidosis (pronounced SAR-COY-DOE-SIS) is an inflammatory disease characterized by the formation of granulomas, tiny clumps of inflammatory cells, in one or more organs of the body.

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Sjogren’s Syndrome

Sjögren’s (“SHOW-grins”) is a systemic autoimmune disease that affects the entire body. Along with symptoms of extensive dryness, other serious complications include profound fatigue, chronic pain, major organ involvement, neuropathies, and lymphomas.

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Systemic lupus erythematosus

Systemic lupus is the most common form of lupus—it’s what most people mean when they refer to “lupus.” Systemic lupus can be mild or severe.

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Vogt-Koyanagi-Harada Syndrome

Vogt-Koyanagi-Harada disease is a rare disorder of unknown origin that affects many body systems, including as the eyes, ears, skin, and the covering of the brain and spinal cord (the meninges).

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Known bacterial causes for recurrent meningitis include Streptococcus pneumoniae, Haemophilus influenzae, Neisseria meningitidis, Staphylococcus aureus, Escherichia coli.

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Known fungal causes for recurrent meningitis include Cryptococcus neoformans, Candida species, Histoplasma capsulatum, Coccidiodes immitis, and Blastomyces dermatitidis.

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Known parasites that can cause recurrent meningitis include Echinococcosis species, Strongyloides stercoralis, and Toxoplasma gondii.

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Viruses (Mollaret's)

Known viral causes for recurrent meningitis include HSV-2, HSV-1, and EBV (HHV-4).

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Craniopharyngioma is a slow-growing, non-cancerous brain tumor that develops near the pituitary gland (a small endocrine gland at the base of the brain which produces several important hormones) and the hypothalamus (an endocrine organ which controls the release of hormones by the pituitary gland).

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Dermoid Cyst

A dermoid cyst is a saclike growth that is present at birth. It contains structures such as hair, fluid, teeth, or skin glands that can be found on or in the skin.

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Epidermoid Cyst

Epidermoid (ep-ih-DUR-moid) cysts are noncancerous small bumps beneath the skin. They can appear anywhere on the skin, but are most common on the face, neck and trunk.

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Leptomeningeal Metastasis of Solid Tumors

Leptomeningeal metastasis (LM), i.e. the seeding of tumor cells to the cerebrospinal fluid (CSF) and the leptomeninges, is a devastating and mostly late-stage complication of various solid tumors.

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Leukemic Meningitis

In leukemic meningitis, cancer cells have spread from the original (primary) tumor to the meninges (thin layers of tissue that cover and protect the brain and spinal cord).

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Lymphomatous Meningitis

In lymphomatous meningitis, cancer cells have spread from the original (primary) tumor to the meninges (thin layers of tissue that cover and protect the brain and spinal cord).

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Antibiotics known to cause recurrent meningitis include trimethoprim-sulfamethoxazole, cephalosporins, amoxicillin, and ciprofloxacin.


Anticonvulsants known to cause recurrent meningitis include lamotrigine and carbamazepine.

Chemotherapeutic Drugs

Chemotherapeutic drugs known to cause recurrent meningitis include cetuximab and intrathecal chemotherapy.

Immunosuppressive Agents

Immunosuppressive agents known to cause recurrent meningitis include IVIG, methotrexate, azathioprine and TNF inhibitors (e.g., adalimumab, infliximab, etanercept).

Non-steroidal Anti-inflammatory Agents

NSAIDs known to cause recurrent meningitis include ibuprofen, diclofenac, naproxen, and sulindac.