Mosquito-borne diseases found in Worcester and Wicomico

Mosquito-borne diseases found in Worcester and Wicomico

(Aug. 30, 2013) The Wicomico and Worcester County Health Departments received updated test results from the State of Maryland that a mosquito pool in southern Worcester County tested positive for Eastern Equine Encephalitis (EEE).  In Wicomico County, there was one pool that tested positive for West Nile Virus (WNV), one pool that tested positive for EEE, and an additional pool tested positive for both.

The pools were sampled in remote, low lying areas of the counties, usually known to have standing water year round. This is in addition to the single sample of mosquitoes from Ocean Pines that tested positive for WNV last week.

West Nile Virus is most common during the summer and fall and the number of infections usually peaks mid-August. The virus is transmitted by infected mosquitoes and spread to humans, birds, horses and other animals.

Since mosquitoes can breed in as little as a quarter inch of water, the recent rain may attract more mosquitoes. Many factors impact when and where outbreaks occur, like weather, numbers of mosquitoes that spread the virus and human behavior.

The Wicomico and Worcester County Health Departments provide the following tips to help prevent contact with mosquitoes and reduce risk of infection by the West Nile virus and EEE:

Stay indoors at dawn and dusk.

Wear long-sleeved shirts and long pants when outdoors.

Use an EPA-registered insect repellent and follow package instructions.

Get rid of mosquito breeding sites: Remove all discarded tires from property; dispose of water-holding containers; change the water in pet dishes and replace the water in bird baths weekly; drill holes in tire swings so water drains out; and keep children’s wading pools empty and on their sides when they are not in use.

Most people infected with West Nile virus will show no symptom, but some have mild to severe symptoms, including swollen lymph glands, a rash, fever, headache, disorientation and others. The easiest and best way to avoid this virus is to prevent mosquito bites.

Signs and symptoms of Eastern Equine Encephalitis include fever, headache, irritability, restlessness, drowsiness, vomiting, diarrhea, cyanosis, convulsions and coma. There are no medications to treat, or vaccines to prevent, EEE virus infection.

People with milder illnesses typically recover on their own, although symptoms may last for several weeks. In more severe cases, patients often need to be hospitalized to receive supportive treatment, such as intravenous fluids, pain medication and nursing care. Anyone who has symptoms that cause concern should contact a health care provider

For more tips and information about West Nile virus and Eastern Equine Encephalitis, please visit our websites at or

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