Chipmunks And Shrews, Not Just Mice, Harbor Lyme DiseaseChipmunks may harbor as much as 13 percent of lyme-infected ticks. (Credit: iStockphoto)ScienceDaily (Dec. 6, 2007) — A study led by a University of Pennsylvania biologist in the tick-infested woods of the Hudson Valley is challenging the widely held belief that mice are the main animal reservoir for Lyme disease in the U.S. The paper demonstrates that chipmunks and two shrew species, not just mice, are the four species that account for major outbreaks. According to the study, white-footed mice account for about a quarter of infected ticks. Short-tailed shrews and masked...