Case of Powassan virus encephalitis in Con…

A USAofficials from the Ministry of Public Health Connecticut declared on May 17, 2022 the death of a ninety-year-old woman from encephalitis powasan virus. This is the second case reported in Connecticut this year 2022, following the case reported in early May (news no. 19180 of May 6, 2022).

The patient lived in County of New London and fell ill in early May. She was admitted to the hospital with fever, altered mental status, headache, chills, chills, chest pain, and nausea, and her condition later worsened. The woman had been bitten by a tick two weeks before symptoms began.

reminders in the powasan virus.

the powasan virus Of genre flaviviruses transmitted to humans by infected ticks (Ixodes). He is responsible for a disease with neurological tropism. In addition to humans, many animals can harbor this virus: groundhogs, hares, coyotes, foxes, raccoons, and skunks, as well as domestic cats and dogs.

The disease is present in North America (Canada and the United States), with more than 40 cases since 1952, and in Russia. Seasonal incidence varies with tick activity (Ixodes cookei, Ixodes marxi, Ixodes spinipalpus) that serve as vectors, greater in rural or forested areas and the risk of transmission is greater from June to September.

After an incubation of 7 to 14 days, appearance of encephalitis with, in milder forms, fever, headache or aseptic meningitis.

Clinical signs of infection may include fever, headache, vomiting, delirium, seizures, and memory loss. Neurological sequelae may occur. There is no specific treatment or vaccine for this disease.

The disease occurs mainly in forested areas with a seasonal occurrence (maximum transmission from June to September, corresponding to tick activity).

Ticks live in woods and brush, tall grass, but also in golf courses and public gardens.

To reduce the risk of becoming infected, the traveler is recommended to:

  • wear clothing that covers the skin and socks riding up the bottom of the pants;
  • walk in the center of trails to avoid grass and brush;
  • use a repellent containing 50% DEET on exposed parts and an insecticide containing permethrin on clothing;
  • check regularly after a few hours for the absence of ticks on the body (thighs, arms, armpits and legs);
  • if there is a tick, remove it with “tick tweezers” by grasping it as close to the skin as possible and gradually pulling (avoid crushing the tick, burning it or applying various substances);
  • wash and disinfect the bite area and hands.

In case of fever, reddening of the skin (in the form of a ring) or other new symptoms after a tick bite, consult a doctor immediately.

Source: ProMED.


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