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Tennessee: West Nile virus and La Crosse encephalitis



The mosquito-borne disease is circulating throughout Tennessee, and state health officials are urging the public to take preventive measures to prevent mosquito-borne diseases.

  Image / francok35
Image / francok35

This comes after reports of two West Nile Virus (WNV) deaths in Shelby County.

"We all know mosquitoes are not just a nuisance ̵

1; last year, 30 Tennessee were infected with the West Nile virus, and unfortunately we've seen two deaths in Shelby County," said TDH commissioner John Dreyzehner, MD, MPH. "Most, but not all, healthy people can fight the West Nile virus infection, but some become seriously ill with serious consequences such as severe pain, long-term or permanent nerve or brain damage, and even death." This is a critical season, and it It is up to all of us to do everything possible to protect ourselves and others from mosquito bites. "

In most years, most cases of West Nile in Tennessee occur in August in September. Allen Tennesseen is advised to use mosquito repellent for the remainder of the summer and early autumn.

The West Nile virus (WNV) was first isolated in 1937 in a woman in the West Nile district of Uganda. In 1999, a WNV circulated in Israel and Tunisia was imported into New York and is now present in the US every year.

WNV detected in dozens of mosquito species

Up to 80% of people infected with West Nile virus develop no symptoms

About 20% of people who become infected with WNV develop West Nile fever. Symptoms include fever, headache, fatigue and body aches, nausea, vomiting, occasional skin rash (on the trunk), and swollen lymph nodes

Less than 1% of people who are infected develop a serious condition neurological disorders such as encephalitis or meningitis ( Inflammation of the brain or surrounding tissues). Of this number, about 10 percent will die.

In addition, health officials have so far seen six cases of La Crosse encephalitis in children.

La Crosse Encephalitis virus (LACV) is transmitted to humans through the bite of an infected mosquito. Most cases of LACV disease occur in the upper middle and middle Atlantic and the southeast.

It was first reported in 1963 in LaCrosse, Wisconsin, and the vector is believed to be a specific species of forest mosquito ( Aedes triseriatus) ) called the tree-hole mosquito

Among the people who become ill are the first symptoms include fever, headache, nausea, vomiting and tiredness. Some of those who become ill develop severe neuroinvasive disease (disease that affects the nervous system).

In rare cases, long-term disability or death may result from La Crosse encephalitis.

The Tennessee Department of Health encourages everyone to follow these precautions to avoid mosquito bites:

  • Use insect repellents such as DEET, Picaridin, Lemongrass Eucalyptus oil or IR3535 on your skin and follow all recommendations on the label. Pay particular attention to recommendations for use in children, and do not apply any of these products around your mouth or eyes at any age. If you have any questions, ask your doctor.
  • Reduce mosquito populations in your home. Mosquitoes can reproduce wherever there is water, including clogged drains or gutters, watering cans and empty bottles.
  • Use products containing permethrin, a highly effective insecticide, for clothing, shoes, mosquito nets, and camping gear. Clothing treated with permethrin repels and kills ticks, mosquitoes and other pests and retains this effect after repeated washing. Some commercial products are available pre-treated with permethrin. However, as a precaution, it should not be used directly on the skin.
  • Wear "long, loose, and light" clothing to prevent stitches from forming through fabric. It's best to wear long-sleeved shirts and long pants. Put your pants in your socks and your shirt in your pants. Bright clothes are less attractive to many insects and allow you to discover them more easily.

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