Record Number of Tick-Borne Diseases Reported in 2017: CDC - NBC Southern California
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Record Number of Tick-Borne Diseases Reported in 2017: CDC

Lyme disease accounted for nearly three-quarters of the illnesses

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    Record Number of Tick-Borne Diseases Reported in 2017: CDC
    John Ewing/Portland Press Herald via Getty Images, File
    This May 7, 2017, file photo shows Maine Medical Center vector-borne ecologist Chuck Lubelczyk collect ticks at a site in Cape Elizabeth. At left is a dog tick; at right, a deer tick.

    U.S. health officials say a record number of tick-borne diseases were reported last year.

    The 2017 tally of more than 59,000 cases is a 22 percent increase from the previous year. The Centers for Disease Control and Prevention released the numbers Wednesday.

    Lyme disease accounted for nearly three-quarters of the illnesses. That's about 43,000 cases.

    Traditionally about 30,000 cases of Lyme disease were reported to the government each year, but experts believed there was underreporting and thought the actual number was more like 300,000.

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    Experts say better reporting may be a reason for recent increases, but scientists have also discovered more diseases transmitted by ticks. Researchers also note that disease-spreading ticks have been seen over a wide range of states.