A tick poses on a leaf, waiting for an animal to brush up against it, so it may crawl on to its new blood host. (For Spectrum Health Beat)
A black-legged tick poses on a leaf, waiting for an animal to brush up against it, so it may crawl on its new blood host. (For Spectrum Health Beat)

They lie in wait in the tall grass, hoping to hop onto unsuspecting passersby.

They’re just teeny-tiny ticks, but these dark-bodied bloodsuckers can pack a powerful—and potentially serious—punch.

And this year, the ticks are out in full force, experts say. The season is expected to be an especially bad one for ticks, because of an explosion of deer and rodents as well as an overall warming trend.

“Many of us have heard about the tick boom,” said Rosemary Olivero, MD, a pediatric infectious disease specialist with the Spectrum Health Medical Group. “It’s important to remember that we always expect a dramatic increase in the presence of all types of ticks during this time of year.”

The Michigan Department of Community Health has reported an increase in black-legged ticks along the Lake Michigan shorelines during the past six years. The black-legged tick was formerly referred to as the deer tick.

Brian Hartl, an epidemiologist at the Kent County Health Department’s Communicable Diseases division, said the tick boom has been a multi-year trend.

“In terms of ticks, we don’t do any surveillance, per se, but we know the tick habitats are spreading eastward,” Hartl explained. “Historically, black-legged ticks—those that carry Lyme disease—have been on the lake shore. But they’re expanding inland from the lakes.”

But there’s more trouble to ticks than just Lyme disease, Dr. Olivero said.

“The black-legged tick can transmit Lyme disease, which is the most common tick-borne infection in Michigan,” she said. “The same tick can also transmit Anaplasmosis and Babesiosis, which almost never occur in Michigan. Other ticks (such as the American Dog tick, Lone Star tick, Woodchuck tick and Brown Dog tick) can transmit other diseases: Rocky Mountain spotted fever, Tularemia, Ehrlichisos, Anaplasmosis and Babesiosis. Luckily these infections are quite rare in Michigan.”

Then, this year, the Centers for Disease Control and Prevention issued a warning about a general uptick in all insect-borne illness.

Last year, the agency shared news about a new, formerly rare tick-borne illness—the Powassan virus. Seventy-five cases of Powassan were reported in the United States in the past 10 years, but that number is expected go up as the ranks of mice and the ticks that carry the disease increase.

Symptoms of this serious infection can include fever, headache, vomiting, weakness, confusion, seizures and memory loss. Long-term neurologic problems may occur. The CDC notes there is no specific treatment, but some people need to be hospitalized to receive respiratory support and intravenous fluids or medications to reduce swelling in the brain.

Hartl said the best defense against ticks is to make it tough for them to latch on in the first place.

“Really it’s just being cognizant of your environment,” he said. “If you’re camping or hiking, wear pants or long socks to keep from getting ticks. They like to hang out in long grass and grab hold of you as you walk by.”

And if you do find a tick attached to your body, properly remove it. There are some videos online for how to do so. Dr. Olivero recommended this video for the proper way to remove ticks. For Lyme disease to be transmitted, ticks need to be attached for 24 to 48 hours.

“If you can remove it quickly enough you can keep from getting Lyme disease,” Hartl said.

Dr. Olivero agreed.

“There are two effective ways to prevent tick bites: wearing long sleeves, and using insect repellents,” she said. “Doing daily tick checks to remove any attached ticks can help prevent contracting Lyme disease from a tick. Important areas to check for ticks include the hairline and behind the ears. Carefully, using pointed tweezers, is the most effective way to remove a tick.”