Delaware Reports First Case of West Nile in Humans in 2 Years - WBOC-TV 16, Delmarvas News Leader, FOX 21 -

Delaware Reports First Case of West Nile in Humans in 2 Years

Posted: 10/12/2017 11:29:00 -04:00 Updated:

DOVER, Del.- A 70-year-old Kent County, Del. woman was briefly hospitalized with West Nile virus and is now recovering at home, according to the Division of Public Health. The case is the first lab-confirmed human WNV case reported in 2017. There were no cases in 2016.

The mosquito-borne illness can become serious and the DPH reminds people to take precautions to avoid mosquito bites.

The Department of Natural Resources and Environmental Control recently announced the continued presence of West Nile virus in sentinel chickens monitored for mosquito-borne diseases. Mosquitoes remain very active, especially during the unseasonably warm weather the state is now experiencing.

“This new case is a reminder that West Nile virus is still active in Delaware,” said DPH Director Dr. Karyl Rattay. “It is just as important during these unseasonably warm fall months as it was in the summer to protect yourself and your loved ones from mosquito bites. These bites can cause much more serious health problems than just itching and discomfort.”

WNV is transmitted by mosquitoes, generally in summer and fall, with a peak period for disease transmissions from mid-August to mid-October. Although nearly 80 percent of people infected with WNV will not become ill, and only a little less than 20 percent of those infected will develop West Nile fever, with mild symptoms (fever, headache, body aches, a skin rash on the chest or back and swollen lymph glands), one in 150 people infected will develop severe infection (West Nile encephalitis or meningitis).

Symptoms of severe WNV infection include headache, high fever, stiff neck, and/or tremors and muscle weakness. The elderly and those with weakened immune systems are most at risk. Anyone who experiences any of these severe symptoms should seek medical help immediately. Symptoms may progress to stupor, disorientation, coma, convulsions, paralysis, and possibly death.

WNV is primarily transmitted to humans by the common house mosquito, while the Asian tiger mosquito can also carry the disease. Mosquitoes in Delaware can also carry viruses which may result in death including Eastern equine encephalitis, which can cause brain inflammation and be fatal to humans and horses, and dengue virus.

Other mosquito-borne diseases that could occur in Delaware include chikungunya, which while rarely fatal, may result in severe and debilitating symptoms including fever and joint pain, and Zika. To date no cases of Zika have been linked with local mosquito or human transmission.

To report suspected cases of human WNV, call the DPH Office of Infectious Disease Epidemiology at 888-295-5156.

To report high numbers of biting mosquitoes, contact the Department of Natural Resources and Environmental Control Mosquito Control Section field offices:

  • Glasgow Office (upstate) - 302-836-2555, for all of New Castle County and the northern half of Kent County, including Dover.
  • Milford Office (downstate) - 302-422-1512, for the southern half of Kent County south of Dover, and for all of Sussex County.

For more information on DNREC Mosquito Control, call 302-739-9917 or visit dnrec.delaware.gov/fw/Services/Pages/MosquitoSection.aspx.

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