Compiled by the ENCLAI research team following a documented methodology · Editorial oversight: Dr Natalya Mathur, Founder · Data last updated: (UTC)

Tick-borne encephalitis in Lithuania: 2026 cases and outbreak reports

Reported tick-borne encephalitis surveillance for Lithuania (LTU) — ▲ Rising · 2025 — latest record 2026-10-07

What the 2026 data shows

As of 31 August 2026, Lithuania has reported 378 tick-borne encephalitis cases in 2026, as published by Lithuania NVSC. The full year 2025 closed at 1,284 cases. 2025 closed 59% above 2024, which is why the trend reads “Rising”.

Of the 8 countries reporting tick-borne encephalitis to ENCLAI in 2026, Lithuania accounts for 15.5% of reported cases and ranks 4 by case count.

ENCLAI has logged 500 surveillance records for tick-borne encephalitis in Lithuania in 2026, with the most detailed reporting in Jun 2026 (479 records); the case counts run to 2026-08-31. 3 distinct surveillance sources reported this pair in 2026.

Reporting authorities for these counts: Lithuania NVSC — Sergamumas užkrečiamosiomis ligomis (Statistinės ataskaitos forma Nr. 4)

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Surveillance summary

2026 cases (YTD)
378
2025 cases (full year)
1,284
Baseline avg (3yr)
N/A
Trend (2025)
▲ Rising · 2025
+59% vs 2024

Reported cases by year, Lithuania

YearReported casesShare of worldwide reports
2023 not reported —
2024 807 16.2%
2025 1,284 31.5%
2026 (year to date) 378 15.5%

Reporting bounds and case definitions vary; historical baselines are a separate comparison measure. Worldwide share compares this country's reported figure with the sum of all countries reporting tick-borne encephalitis to ENCLAI for that year. "Incomplete year" means our sources cover less than ten months of that year, so no full-year figure is shown; "outbreak total to date" is a running total since an outbreak began, not a count for one year.

Surveillance records logged in 2026

MonthRecordsReporting sources
Jun 20264791
Jul 202611
Oct 2026201

A record is one dated surveillance publication or one row of an official table; a month with many records is a month with detailed reporting, not necessarily more cases.

Tick-borne encephalitis in other countries, 2026

Country2026 casesTrend
Poland 905 ≈ Stable · 2025
Finland 461 ≈ Stable · 2025
Switzerland 399 ▲ Rising · 2025
Latvia 155 ≈ Stable · 2025
Slovenia 70

Other diseases reported in Lithuania, 2026

Disease2026 casesTrend
Viral gastroenteritis, unspecified 8,550 ▲ Rising · 2025
Lyme borreliosis 8,166 ▲ Rising · 2025
Varicella 5,177 ▲ Rising · 2025
Rotavirus enteritis 2,214 ▲ Rising · 2025
Scabies 1,726 ▲ Rising · 2025

Questions about this page

How many tick-borne encephalitis cases has Lithuania reported in 2026?
As of 31 August 2026, Lithuania has reported 378 tick-borne encephalitis cases in 2026, as published by Lithuania NVSC. The full year 2025 closed at 1,284 cases. 2025 closed 59% above 2024, which is why the trend reads “Rising”.
Is tick-borne encephalitis rising or falling in Lithuania?
ENCLAI's trend reading for tick-borne encephalitis in Lithuania is “Rising · 2025”: the latest complete year is compared with the earlier baseline from the reported counts; the current year is not judged until it closes.
Where does Lithuania publish tick-borne encephalitis surveillance data?
The counts on this page were published by Lithuania NVSC — Sergamumas užkrečiamosiomis ligomis (Statistinės ataskaitos forma Nr. 4). ENCLAI compiles and normalises them and is not affiliated with these authorities.

About this data

Figures are reported case counts as published by the originating health authorities, compiled by ENCLAI from 444 verified surveillance sources. Lithuania figures reflect the reporting available to ENCLAI; reporting periods and case definitions differ between sources, and a missing report does not establish zero cases. ENCLAI holds tick-borne encephalitis records for Lithuania dated from 2010. How we verify and update data: methodology & Trust Center · understanding case counts.

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The daily disease brief

One email a day: what changed in official disease reporting worldwide, with the source named for every number. Reported facts only — no forecasts and no interpretation.

Double opt-in — we send a confirmation link and nothing else until you click it. One-click unsubscribe on every email. See our privacy notice.