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Diversity of Babesia in Ixodes ricinus ticks in Poland

Welc-Faleciak, R., Bajer, A., Paziewska-Harris, A., Baumann-Popczyk, A. and Sinski, E. 2012. Diversity of Babesia in Ixodes ricinus ticks in Poland. Advances in Medical Sciences 57 (2) , pp. 364-369. 10.2478/v10039-012-0023-9

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Purpose The aims of this study were: (1) to estimate Babesia prevalence in the most common species of tick in Poland, Ixodes ricinus, in two recreational areas (Urwitałt in the Mazury Lake District and Bielański Forest in Warsaw), and (2) to evaluate the molecular diversity of Babesia isolates in questing I. ricinus in Poland. Material and Methods Questing ticks were collected from vegetation in forest areas in Urwitałt near Mikołajki and in Bielański Forest (Warsaw). Purified genomic DNA was used with specific primers to amplify a fragment of the Babesia spp. 18S rRNA gene. Results Tick-drag indices for I. ricinus were high in both study areas, reaching somewhat higher values in Urwitałt than in Bielański Forest. The overall prevalence of Babesia spp. in examined ticks was 1.6%. In Urwitałt, two strains of B. microti were identified using rRNA sequences: the enzootic Munich strain and an isolate close to the zoonotic Jena strain. The proportion of infections due to these two strains in questing ticks reversed over a six-year period. During 3 years of study in Bielański Forest, all Babesia isolates obtained from I. ricinus were identical to Babesia sp. EU1 (B. venatorum), previously recognized as an agent of human babesiosis. Conclusions This study has confirmed the presence of enzoonotic and zoonotic Babesia species/strains in the abundant human-biting tick I. ricinus in recreational areas in Poland. It has also shown that the distribution of different genotypes has changed over time, however the reasons for these fluctuations still remain to be investigated.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Biosciences
Publisher: De Gruyter Open / Medical University of Bialystok and VERSITA
ISSN: 1896-1126
Date of Acceptance: 18 April 2012
Last Modified: 15 Apr 2019 15:00

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