Tick-borne virus confirmed in Wisconsin, leads to death

MARSHFIELD – A rare but potentially deadly tick-borne illness is making headlines in Wisconsin after health officials confirmed recent cases of Powassan virus.
Although the virus remains rare, its severity is alarming. According to reports from state health officials, three adults in Wisconsin have been hospitalized with the virus this summer, and one person has died. Young children, the elderly, immunocompromised and people living alone are especially vulnerable.
The virus, transmitted by the same blacklegged tick that spreads Lyme disease, has clinicians on alert and public health experts urging vigilance.
Powassan virus is part of the flavivirus family, a group of viruses that includes more familiar names like West Nile, Zika, and Dengue. Unlike its mosquito-borne cousins, Powassan is transmitted exclusively by the Ixodes scapularis, or blacklegged tick. These ticks are known carriers of multiple pathogens and, once transmitted, the virus can move rapidly through the bloodstream to the brain, causing viral encephalitis, a dangerous swelling of the brain that may result in long-term neurological damage or even death.
Dr. James Thatcher, a physician at the Aspirus Tick-Borne Illness Center, said the symptoms can be severe.

“Fevers and headaches, malaise, not eating, not drinking, not communicating,” he said. “Basically, brain-on-fire symptoms we would call it.”
Unlike Lyme disease, which can often be treated with antibiotics, Powassan virus has no widely recognized cure. It attacks the nervous system and can lead to viral encephalitis, inflammation of the brain, which can be fatal or result in long-term neurological issues.
“Classically, the early Lyme arthritis is going to be joint pain, migratory joint pain. You may or may not get that with viral encephalitis,” Thatcher said. “Because, it is mostly going to be more internal suffering, less physical suffering, but neurological Lyme disease can look a lot like Powassan infection.”
Thatcher emphasized that early prevention is key. While chemicals like DEET, Permethrin and Picaridin remain effective tick repellents, the Aspirus Tick-Borne Illness Center also promotes natural alternatives.
“There are natural herbs like cedarwood oil, lemongrass, thyme, clove that help repel ticks, but also the other bugs,” he said. “You know, the mosquitoes that bring us those viral illnesses, the biting flies that bring us Bartonella and some other things that maybe are worse than Lyme disease. So, we got to protect ourselves from all bugs.”