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Smartphone Inverted Filter Helps Find Hidden Ticks

Built into most smartphones, the magnifier function uses inverted colors to boost contrast, revealing ticks on fur or skin

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Overview

  • Germany’s mild winter and northward species shifts have driven record tick numbers with up to 40 percent carrying Borrelia bacteria
  • The “Invertiert” filter in a phone’s magnifier app swaps colors to make blood-sucking ticks stand out against hair or skin
  • iOS users enable the filter by opening the Magnifier app, tapping the gear icon, adding the Filter control and selecting Inverted
  • Android owners can set up a Magnifier shortcut in settings to access the inverted view, while Google Pixel 4a (5G) and older models require third-party apps
  • Early spotting of tiny nymph ticks supports prompt removal and helps prevent tick-borne diseases like Borreliosis and FSME