NEW CASTLE, DE – The Delaware Public Health Laboratory has identified the state’s first human cases of West Nile Virus (WNV) this year in three men over 50, all residing in New Castle County. The individuals were hospitalized due to the mosquito-borne disease, according to an announcement from the Delaware Division of Public Health (DPH).
DPH and the Delaware Department of Natural Resources and Environmental Control (DNREC) are stepping up mosquito surveillance near the residences of the infected individuals. Depending on future findings, DNREC’s Mosquito Control Section may work with DPH to conduct local control operations to mitigate the risk of further human WNV transmissions. These human cases coincide with an uptick in WNV activity observed in DNREC’s sentinel chicken monitoring program.
WNV is transmitted by mosquitoes, primarily between mid-August and mid-October. Most people infected with WNV do not fall ill, but about 20% will develop mild symptoms, such as fever and body aches. In rare cases, severe infections can occur, leading to encephalitis or meningitis, and may be fatal.
Elderly individuals and those with weakened immune systems are particularly at risk. Immediate medical attention is advised for anyone experiencing severe symptoms such as high fever, stiff neck, or tremors and muscle weakness.
Preventative measures include the use of insect repellents containing DEET or Picaridin and wearing long-sleeved, light-colored clothing. The public is also urged to eliminate standing water on their properties to reduce mosquito breeding habitats.
For suspected cases of human WNV, contact the Division of Public Health Office of Infectious Disease Epidemiology at 888-295-5156. Further information on mosquito control in Delaware can be found on DNREC’s website.