Tick-borne encephalitis can lead to chronic illness

Tick-borne encephalitis (TBE) is a virus transmitted by ticks, which affects the central nervous system and is typically found in Europe and Asia. TBE is best-known to cause meningitis, meningoencephalitis, and meningoencephalomyelitis. There is no treatment for TBE, but the disease is preventable through vaccinations.

In an effort to better understand the role of the immune responses in the clinical course and post-treatment outcome of tick-borne encephalitis, Bogovič  and colleagues “assessed 24 cytokines and chemokines associated with innate and adaptive (T and B cell) immune responses.”

The study entitled Inflammatory Immune Responses in Patients with Tick-Borne Encephalitis: Dynamics and Association with the Outcome of the Disease compared the levels of inflammatory mediators during acute illness and later at follow-up time points “to evaluate whether immune responses at each time point were associated with the outcome of the disease.”¹

1 in 3 patients with chronic symptoms

The authors found that “at least 30% of patients develop a post-encephalitic syndrome (PES), and approximately 5% are affected by permanent pareses.”

These patients report having “persistent symptoms such as fatigue, arthralgias and myalgias, headache, dizziness, sleep disorders, emotional lability, memory and concentration disorders, etc., termed PES.”

Post-encephalitic syndrome may be due to “inappropriate activation of host immune responses following [tick-borne encephalitis virus] infection,” the authors suggest.

Furthermore, this “immune response may take months to years to return to homeostasis.”

A new study finds 1 in 3 patients with tick-borne encephalitis develops chronic symptoms. Click To Tweet

“These findings provide new insights into the immunopathogenesis of TBE [tick-borne encephalitis] and implicate inflammatory immune responses with post-encephalitic syndrome years after the initial infection,” the authors conclude.

Tick-borne encephalitis and Lyme disease

  • A black-legged (Ixodes spp) tick can transmit infectious pathogens causing both TBE and Lyme disease.
  • Although there is no antiviral treatment for TBE,  antibiotics can be used to treat Lyme disease and many of the co-infections.
  • There is currently a vaccine for tick-borne encephalitis. But the vaccine to prevent Lyme disease and co-infections was voluntarily taken off the market in 2002.

Individuals with tick-borne encephalitis can also be infected with Borrelia burgdorferi. In one study, “62 (9.1%) [patients] had proven co-infection with borreliae and 240 (35.1%) had possible co-infection,” writes Velušcek.² Meanwhile, proven borrelial co-infections have been reported even higher (13.5% and 16.7%) in other studies, writes. Velušcek.

References:
  1. Bogovič P, Lusa L, Korva M, Lotrič-Furlan S, Resman-Rus K, Pavletič M, Avšič-Županc T, Strle K, Strle F. Inflammatory Immune Responses in Patients with Tick-Borne Encephalitis: Dynamics and Association with the Outcome of the Disease. Microorganisms. 2019 Oct 31;7(11).
  2. Velušček M, Blagus R, Cerar Kišek T, Ružić-Sabljić E, Avšič-Županc T, F Bajrović F, Stupica D. Antibiotic Use and Long-Term Outcome in Patients with Tick-Borne Encephalitis and Co-Infection with Borrelia Burgdorferi Sensu Lato in Central Europe. A Retrospective Cohort Study. J Clin Med. 2019 Oct 20;8(10).
Latest From the Lyme Disease Science Blog


5 Replies to "Tick-borne encephalitis can lead to chronic illness"

  • Billie Gray
    01/16/2020 (8:19 pm)
    Reply

    I was found having a negative lyme test. Unfortunately a little black tick bit me neck 1 1/2 years ago. I was extremely articulate, am losing so much of my vocabulary now. My balance has improved, however, when walking outside I still feel extremely unstable intermittently. I have had 8 kenalog injections in the last 1 1/2 years ( two to left foot, 1 to right foot, 2 to right knee, 3 to right shoulder) all for pain. Continue to have fatigue although it is better now. Have sleep problems. Up alot after sleepng 2 or 3 hrs, then, 2-3 hrs up until I can go back to sleep. Have not found a medical doctor who has any idea of what is wrong with me, completely egnoring the fact that a tick bit me in the neck. I have seen rhumatologist, neurologist, infectious disease, orthopedic and primary care.

    • Dr. Daniel Cameron
      01/16/2020 (8:46 pm)
      Reply

      I run into rheumatologists, neurologists, infectious disease specialists, orthopedics and primary care doctors who are talented but don’t address Lyme and tick-borne illnesses. I recommend a second opinion with a doctor experienced in diagnosing Lyme disease. You should also be aware that steroids can make a tick-borne illness more difficult to treat. Call my office at 914-666-4665 if you have any questions.

  • Sarah Horner
    01/16/2020 (5:51 am)
    Reply

    I believe this is me sounds exactly like my symptoms feeling hopeless

    • Dr. Daniel Cameron
      01/16/2020 (8:46 am)
      Reply

      This article focuses on a tick-borne problem that is common in Europe. The study reminds people not to overlook Lyme disease in these patients. The study also reminds us of the need to understand the mechanism of chronic illness.

    • Stacey Sbuscio
      01/17/2020 (11:40 am)
      Reply

      I miss you Sarah! Keep fighting


Join the Lyme Conversation
(Note: comments are moderated. You will see your comment after it has been reviewed.)

Some html is OK