US Tick Experts Urge Deer Culls as Lyme Cases More Than Double

3 articles · Updated · The Atlantic · Aug 3

Lyme cases have more than doubled since 2000, and researchers say personal precautions like permethrin-treated clothes and tick checks no longer match the scale of the U.S. tick threat.
Eight new tick-borne diseases have been identified in that period, alongside alpha-gal syndrome, as expanding deer tick and lone star tick populations spread pathogens into more places and people.
Deer management sits at the center of the proposed response: one deer can feed 1,500 female deer ticks, and experts say transmission often will not break unless deer density falls below 10 per square mile.
Evidence for culls is strongest on Monhegan Island, where a 1997 deer removal was followed by Lyme's near-disappearance, though hunting and lethal control remain politically difficult in suburbs and protected areas.
Researchers are also testing targeted pesticides, fluralaner treatments for deer, and deer vaccines, arguing tick control needs a mosquito-style public program rather than relying on households alone.