Friday, July 12th, 2024

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Friday, July 12th, 2024

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Ticks thriving after mild winter

Researchers say it is hard to predict how the tick season will play out, but this year’s mild winter and early snow melt in some parts of the country could mean more ticks earlier than usual and a wider spread of Lyme disease and other tickborne diseases, scientists said. (Photo by Eric Morken)

By Patrick Whittle

Associated Press

Portland, Maine — After a mild winter in the U.S., will there be an uptick in ticks this year?

Researchers say it is hard to predict how the tick season will play out. This year’s mild winter and early snow melt, though, could mean more ticks earlier than usual and a wider spread of Lyme disease and other tickborne diseases, scientists said.

In Connecticut, ticks are showing up in greater numbers this year, according to Goudarz Molaei, a tick expert for the state. Since Jan. 1, more than 1,000 ticks have been sent in for a testing program, and that is the second highest number of submissions in recent years. The state typically sees a lot of Lyme disease, which got its name from a Connecticut town.

“It’s going to be an above average year for tick activity and abundance,” Molaei said.

Tick-spread diseases

Infected ticks spread bacteria, viruses and parasites that make people sick. Lyme disease is the most common tick-borne infection in the U.S., mostly in the Northeast and Midwest. An estimated 476,000 Americans are diagnosed with Lyme disease each year, according to the Centers for Disease Control and Prevention. Black-legged ticks, also called deer ticks, can carry more than Lyme-causing bacteria. They can also spread babesiosis, anaplasmosis and Powassan virus disease. The lone star tick, mainly located in southern, eastern and midwestern states, can carry ehrlichiosis and Heartland virus disease.

American dog ticks can spread Rocky Mountain spotted fever. Ticks pick up disease-causing germs by biting infected wildlife, usually rodents.

Tick season

It varies by region, but tick season generally stretches from April to October. Ticks are mostly dormant during the cold winter months, and emerge as temperatures rise, but can be active on warm winter days, too. Memorial Day is often considered the start of the season but that’s largely because that’s when people in cold-weather states start spending more time outdoors, said Sam Telford of Tufts University’s school of veterinary medicine in North Grafton, Massachusetts. Lyme disease cases typically peak in June, July and August. April and May are typically lighter months, but not always.

Tiny ticks at the nymph stage – about the size of poppy seed – could be active early this year, said Dr. Bobbi Pritt, who studies tick-borne diseases at the Mayo Clinic in Rochester, Minnesota. “When we have mild winters, we do anticipate that the ticks are going to be out earlier, and biting humans,” Pritt said.

Why the uptick?

Government disease trackers say predicting how tick-borne diseases will trend is complicated. The number of ticks can vary from region to region, and diagnoses can be affected by how well different doctors test and report cases. The changing climate has both positive and negative implications for ticks, as warm, wet weather is beneficial to them, but especially hot weather is not, Telford said. Tiny ticks could indeed be active early, but a dry, hot summer could also kill ticks, he said. The best approach is to assume ticks will be very active. “Every year should be considered a bad tick year,” he said.


Thankfully, there are numerous ways to prevent tick bites.

The CDC recommends treating clothing with products containing 0.5% permethrin. It’s also important to be especially cautious in areas where ticks live, such as grassy and wooded areas. Using repellents and doing thorough checks afterward is also key, the CDC says. Limiting exposed skin also helps avoid bites.

The disease can cause a fever, chills, fatigue and muscle and joint pain. It is treated with antibiotics, and most people recover. Left untreated, it can worsen, causing symptoms such as heart problems and debilitating pain. There is no Lyme vaccine on the market in the U.S. for people but one is being tested.

AP reporter Mike Stobbe in New York and data journalist Camille Fassett in Seattle contributed to this report.

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