The Louisiana Department of Health (DHH) has confirmed 19 additional human cases of West Nile Virus, bringing this year's total to 33, which includes 13 new cases of the potentially deadly neuroinvasive disease (NID). The new NID cases were reported from Caddo, Concordia, East Baton Rouge, Jefferson, Lafourche, Livingston, Orleans, Ouachita, Rapides and St. Tammany parishes. There were also new West Nile Fever (WNF) cases in Calcasieu, East Baton Rouge and St. Tammany parishes and new asymptomatic cases in Concordia, Rapides and Terrebonne parishes. These cases are detailed parish by parish in LDH's weekly Louisiana Arbovirus Surveillance Reports Section of the LDH Website here.
Health officials characterize West Nile infections three ways: NID, WNF and asymptomatic. A NID illness is severe and typically results in a swelling of the brain or spinal cord. People with this illness are at risk of brain damage or death. WNF is less severe, with most people only suffering mild, flu-like symptoms. Asymptomatic individuals were never ill and were only discovered to have the West Nile virus in their blood when blood work was done for some other reason, such as blood donation.
This year, St. Tammany Parish has reported the most West Nile Virus infections with four NID cases, and one case each of WNF and asymptomatic. East Baton Rouge Parish has reported three NID and two WNF cases.
About 90 percent of all cases are asymptomatic, while about 10 percent will develop West Nile fever. Only a very small number of infected individuals will show the serious symptoms associated with the neuroinvasive disease. Residents who are 65 years old and older are at higher risk for complications, but everyone is at risk for infection.
"This week we have seen a substantial increase in the number of neuroinvasive disease cases," said Dr. Ratard LDH State Epidemiologist. "This serves as a reminder that we should not be complacent, we should be on guard and take all the necessary precautions and measures to protect ourselves and our loved ones from being bitten by mosquitos."
- If you will be outside, you should wear a mosquito repellent containing DEET. The American Academy of Pediatrics (AAP) recommends that repellents should contain no more than 30% DEET when used on children. Insect repellents also are not recommended for children younger than 2 months. CDC recommends that you always follow the recommendations appearing on the product label when using repellent.
- Apply repellent on exposed skin and clothing. Do not apply under your clothes or on broken skin.
- To apply repellent to your face, spray on your hands and then rub on your face.
- Adults should always apply repellent to children.
- Wear long-sleeved shirts and pants when outdoors for long periods of time.
- Avoid perfumes and colognes when outdoors for extended periods of time.
- Make sure that your house has tight-fitting windows and doors, and that all screens are free of holes.
Mosquito Population Control
- Reduce the mosquito population by eliminating standing water around your home, which is where mosquitoes breed.
- Dispose of tin cans, ceramic pots and other unnecessary containers that have accumulated on your property. Turn over wheelbarrows, plastic wading pools or buckets that could collect water.
- Drill holes in the bottom of outdoor recycling containers. Drainage holes that are located on the container sides collect enough water for mosquitoes to breed.
- Clean clogged roof gutters yearly. They are often overlooked, but can produce millions of mosquitoes each season.
- Aerate ornamental pools or stock them with fish. Water gardens can become major mosquito producers if they are allowed to stagnate.
- Clean and chlorinate swimming pools that are not being used. A swimming pool that is left untended by a family that goes on vacation for a month can produce enough mosquitoes to result in neighborhood-wide complaints. Be aware that mosquitoes may even breed in the water that collects on swimming pool covers.
The Louisiana Department of Health strives to protect and promote health statewide and to ensure access to medical, preventive and rehabilitative services for all state citizens. To learn more about LDH, visit http://www.dhh.louisiana.gov. For up-to-date health information, news and emergency updates, follow LDH's blog, Twitter account and Facebook.