The knowledge of the exact distribution of tick-borne encephalitis virus (TBEV) endemic foci is crucial to plan and implement the optimal prevention of tick-borne encephalitis (TBE), including a vaccination program. In Poland, however, there is still no data on the local distribution of TBEV in many areas of the country. Silesian agglomeration area (Southern Poland) is a highly urbanized and industrialized region of the country, where TBE cases are only sporadically recorded. In this study, a total of 4350 adult Ixodes ricinus were collected between September 2010 and June 2012 at twelve locations. The screening using real-time PCR was carried out on 854 tick pools of five specimens, and the positive pools were verified by pyrosequencing. TBEV was identified in 13 pools (1.52%) at 4 sites, of which 9 pools were verified by pyrosequencing. An overall pool prevalence was estimated at 0.31% ranging from 0.19% to 1.11% for positive locations [95% CI 0.16-0.52], which is comparable with regions with high number of TBE cases reported annually.
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