This is a March 2002 file photo of a deer tick under a microscope in the entomology lab at the University of Rhode Island in South Kingstown, R.I. Besides their creepy-crawliness and the itching that comes from their bites, ticks are vectors of several pathogens. Of the options available for protection, Douglas County resident Luann Dixon says she has found only one that works for her: permethrin.

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