Like most Wisconsinites, Burt Olson loves the outdoors. For decades, he and his German shorthaired pointers have scrambled over the state’s hills and valleys in search of elusive grouse. Olson, an expert in population health and a professor at the University of Wisconsin-Madison Medical School, started to worry when, in addition to double vision, he was suddenly unable to remember lectures he had given for years. A series of tests revealed that a bacterium in Olson’s brain was interfering with his neurological function. And this bacterium had been injected by the bite of a deer tick.
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