Is Febrile infection-related epilepsy syndrome - FIRES contagious?

Febrile infection-related epilepsy syndrome (FIRES) is not contagious and cannot be spread from person to person through contact, droplets, or any other means. While the onset of FIRES is often preceded by a common viral or bacterial infection, the syndrome itself is an immune-mediated or inflammatory reaction, not an infectious disease.

Why is there confusion about the contagiousness of FIRES?

The name "Febrile infection-related epilepsy syndrome" often leads to the misconception that it is an infectious disease. Because Febrile infection-related epilepsy syndrome (FIRES) typically begins after a child or young adult experiences a feverish illness, people often confuse the initial viral trigger with the syndrome itself. However, the syndrome is a catastrophic, drug-resistant epilepsy that occurs after the infection has often already cleared.

What is the actual cause of FIRES?

The exact cause of Febrile infection-related epilepsy syndrome (FIRES) remains a subject of intense medical research. Current scientific consensus suggests it is likely an autoimmune or autoinflammatory response to an initial infection. In these cases, the body’s immune system becomes "hyper-activated" following a minor illness, leading to intense neuroinflammation that triggers continuous seizures. It is not considered a genetic condition, though researchers are investigating if certain individuals have a genetic predisposition to this extreme inflammatory response.

Is it safe to be around someone with FIRES?

There is absolutely no risk in living with, touching, or caring for someone with Febrile infection-related epilepsy syndrome (FIRES). Because the condition is an internal inflammatory process rather than a pathogen, it poses no danger to family members, caregivers, or peers. Social isolation based on fear of contagion is never medically warranted.

Understanding the triggers of FIRES

While the condition itself is not infectious, environmental triggers are key to its presentation. Patients with Febrile infection-related epilepsy syndrome (FIRES) typically experience:

• An antecedent febrile illness (fever) occurring 24 hours to 2 weeks before seizure onset.


• A subsequent state of refractory status epilepticus (continuous seizures that do not respond to standard medication).


• No evidence of direct central nervous system infection (like meningitis or encephalitis) at the time of the epilepsy onset.

Next steps

• Consult a pediatric or adult epileptologist specializing in neuroimmunology.


• Connect with the 65 members of the Febrile infection-related epilepsy syndrome (FIRES) community on DiseaseMaps.org for peer support.


• Review resources from the Epilepsy Foundation to help educate schools and family members about the non-contagious nature of the condition.

Medical disclaimer: This information is for educational purposes only and should not replace professional medical advice, diagnosis, or treatment.

References

• NIH Genetic and Rare Diseases Information Center (GARD): FIRES.


• Orphanet: Febrile infection-related epilepsy syndrome.


• The NORSE Institute (New-Onset Refractory Status Epilepticus).


• PubMed/NCBI: Clinical reviews on the pathophysiology of FIRES.