Within the last years, the incidences of diseases transmitted by Ixodes ricinus tick have rapidly increased. We estimated the occurrence of Ixodes ricinus in the popular recreation urban areas in Szczecin and in the Province of Szczecin. The study was carried out in 1999, with two samples at each site, and were compared with data of 1998. The temperature and humidity of air were measured. The most ticks were found in the range of 70-80% relative humidity of air. Among 3.198 specimens collected 59.5% were nymphs, 19.0% larvae, 11.1% females and 10.4% males. The nymphs were the most frequent in spring and in autumn, while the larvae were most frequent in autumn (26.2%) then in spring (11.9%).
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