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TBE Symptoms: Signs & Progression of Tick-Borne Encephalitis

TBE symptoms include fever, headache, and neurological complaints. The tick-borne disease often follows a two-phase course. Learn about signs, progression, and prevention.

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Things worth knowing about "TBE symptoms"

TBE symptoms include fever, headache, and neurological complaints. The tick-borne disease often follows a two-phase course. Learn about signs, progression, and prevention.

What is TBE?

Tick-borne encephalitis (TBE) is a viral inflammation of the brain and meninges caused by the TBE virus, a member of the Flavivirus family. It is transmitted through the bite of infected ticks, primarily Ixodes ricinus in Europe. TBE is most prevalent in endemic areas of Central and Eastern Europe, Scandinavia, and parts of Asia.

Typical TBE Symptoms and Course of Disease

TBE typically progresses in two distinct phases, separated by a symptom-free interval. Notably, only about 10–30% of infected individuals develop any symptoms at all.

First Phase: Flu-like Symptoms

The first phase usually begins 7–14 days after the tick bite and resembles a common flu:

Fever (typically 38–39 °C / 100–102 °F)
General malaise and fatigue
Headache
Muscle and joint pain
Nausea and loss of appetite

This phase usually lasts 2–7 days and resolves on its own. In approximately two-thirds of symptomatic patients, the illness ends at this stage.

Second Phase: Neurological Symptoms

In about one-third of symptomatic patients, a second, more severe phase follows after a symptom-free interval of 1–20 days. This phase involves the central nervous system:

Meningitis (inflammation of the meninges): severe headache, neck stiffness, sensitivity to light and noise
Encephalitis (brain inflammation): confusion, altered consciousness, sleep disturbances, coordination problems
Myelitis (spinal cord inflammation): limb weakness or paralysis, swallowing difficulties, respiratory problems (in severe cases)
Personality changes and difficulty concentrating
Seizures (rare)

High-risk Groups

Severe disease is more common in older adults. Children tend to develop milder illness. Immunocompromised individuals are at higher risk for severe outcomes.

Diagnosis

Diagnosis is confirmed through a blood test detecting specific antibodies (IgM and IgG) against the TBE virus. In cases with neurological symptoms, a lumbar puncture (cerebrospinal fluid analysis) is performed. MRI imaging may reveal inflammation in the brain.

Treatment

There is no specific antiviral therapy for TBE. Treatment is symptomatic and supportive:

Antipyretic and analgesic medications to reduce fever and pain
Physical rest and bed rest
In severe cases: hospitalization, intensive care, and possibly mechanical ventilation
Rehabilitation after recovery from the acute illness

Prevention: Vaccination and Tick Protection

The most effective prevention against TBE is vaccination, recommended for all individuals living in or traveling to endemic areas. Additional protective measures include:

Wearing long-sleeved clothing when outdoors in tick habitats
Using insect repellents
Regularly checking the body for ticks after outdoor activities
Promptly and correctly removing any attached ticks

When to See a Doctor?

Following a tick bite in a TBE-endemic area, medical attention should be sought promptly if fever, severe headache, or neurological symptoms develop. Neck stiffness, confusion, or signs of paralysis require immediate medical evaluation.

References

Robert Koch Institute (RKI): Tick-borne Encephalitis (TBE). RKI Advisory, 2023. Available at: www.rki.de
Bogovic, P. & Strle, F. (2015): Tick-borne encephalitis: A review of epidemiology, clinical characteristics, and management. World Journal of Clinical Cases, 3(5), 430–441. PubMed PMID: 25984518.
World Health Organization (WHO): Tick-borne encephalitis. Available at: www.who.int

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