First West Nile virus-positive mosquito of the year discovered |

West Nile Virus detected — State health officials have elevated the risk of West Nile virus in a number of eastern Massachusetts communities.
Courtesy photo

BOSTON 鈥� The Massachusetts Department of Public Health (DPH) announced this week that West Nile virus (WNV) has been detected in mosquitoes in Massachusetts for the first time this year.

The presence of WNV was confirmed Tuesday by the Massachusetts State Public Health Laboratory in a mosquito sample collected on June 13 in Shrewsbury.

This page requires Javascript.

Javascript is required for you to be able to read premium content. Please enable it in your browser settings.

AVOIDING WIDE

The following tips can help prevent the spread of West Nile virus:

- Apply insect repellent when outdoors. Use a repellent with an EPA-registered ingredient (DEET (N,N-Diethyl-m-toluamide), permethrin, picaridin (KBR 3023), oil of lemon eucalyptus (p-menthane-3,8-diol (PMD) or IR3535) according to the instructions on the product label. DEET products should not be used on infants under two months of age and should be used in concentrations of 30 percent or less on older children. Oil of lemon eucalyptus should not be used on children under three years of age.

- Be aware of peak mosquito hours. The hours from dusk to dawn are peak biting times for many mosquitoes. Consider rescheduling outdoor activities that occur during the evening or early morning in areas of high risk.

- Clothing can help reduce mosquito bites. Wearing long sleeves, long pants, and socks when outdoors will help keep mosquitoes away from your skin. Drain standing water. Mosquitoes lay their eggs in standing water. Limit the number of places around your home for mosquitoes to breed by either draining or discarding items that hold water. Check rain gutters and drains. Empty any unused flowerpots and wading pools and change the water in birdbaths frequently.

- Install or repair screens. Keep mosquitoes outside by having tightly fitting screens on all your windows and doors.

- Protect your animals. Animal owners should reduce potential mosquito breeding sites on their property by eliminating standing water from containers such as buckets, tires, and wading pools 鈥� especially after heavy rains. Water troughs provide excellent mosquito breeding habitats and should be flushed out at least once a week during the summer months to reduce mosquitoes near paddock areas. Horse owners should keep horses in indoor stalls at night to reduce their risk of exposure to mosquitoes. Owners should also speak with their veterinarian about mosquito repellents approved for use in animals and vaccinations to prevent WNV and EEE.

- If an animal is suspected of having WNV or EEE, owners are required to report to the Department of Agricultural Resources, Division of Animal Health by calling 617-626-1795, and to the Department of Public Health by calling 617-983-6800.

More information, including all WNV and EEE positive results, can be found on the Arbovirus Surveillance Information web page at Mosquito-borne Diseases | Mass.gov, which is updated daily, or by calling the DPH Division of Epidemiology at 617-983-6800.