The Dutch National Institute for Public Health and Environment (RIVM) has announced that 47 % of ticks reported in 2025 stayed attached to the skin for twelve hours or longer, a decrease from 56 % recorded a decade earlier. Data from Tekenradar.nl show that a tick’s duration of attachment increases the likelihood of Lyme disease transmission. In the Netherlands, one in five ticks carries the Lyme‑causing bacterium, but only one in 50 bites results in the disease. RIVM urges people who visit green spaces to conduct a tick check promptly and to remove attached ticks with tweezers or a tick remover. They recommend monitoring the bite site for three months and seeking medical attention if a rash, fever, muscle pain or joint pain appears.
© National Institute for Public Health and the Environment (RIVM).
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