BOSTON – Massachusetts Department of Public Health (DPH) disclosed today the identification of the fifth case of West Nile virus (WNV) in the state this year. The patient is a man in his 70s from Hampden County. Meanwhile, in 2022, Massachusetts had recorded eight human cases of West Nile Virus.
The risk of WNV is currently moderate in the Greater Boston area, which includes Middlesex, Norfolk, and Suffolk counties. Furthermore, areas of Berkshire, Bristol, Hampden, Hampshire, Plymouth, and Worcester counties have similar risk levels. However, the recent diagnosis has not affected these risk ratings.
Seasonal Impact on Mosquito Activity
Despite the onset of cooler weather reducing mosquito activity, the danger from mosquito-borne diseases lingers until the season’s first heavy frost. Consequently, Dr. Catherine M. Brown, State Epidemiologist, emphasizes the importance of individuals taking protective measures against mosquito bites while outside.
“Although mosquito activity is decreasing with the cooler weather, some risk from mosquito-borne disease will continue until the first hard frost. People should continue to take steps to protect themselves from mosquito bites anytime they are outdoors.”
Dr. Catherine M. Brown, State Epidemiologist
West Nile Virus has the potential to affect people of all age groups. Although, individuals over 50 are particularly at a higher risk of experiencing severe symptoms. On the bright side, many who contract WNV remain asymptomatic. If symptoms do manifest, they often resemble flu-like conditions, but severe cases, although rare, can develop.
Tips to Avoid West Nile Virus
To fend off mosquitoes and reduce the chance of disease transmission, the DPH recommends several proactive measures. Firstly, when outdoors, applying an insect repellent containing an EPA-approved ingredient is crucial. These ingredients include DEET, permethrin, picaridin, oil of lemon eucalyptus, or IR3535. It’s essential to follow the product’s guidelines, especially for children and infants. Secondly, people should be particularly cautious during peak mosquito hours, typically from dusk to dawn. Rescheduling evening or early morning outdoor activities in high-risk zones is advisable. Lastly, wearing protective clothing like long sleeves, long pants, and socks can shield the skin from potential bites.
Home West Nile Virus Precautions
Taking steps to make one’s home mosquito-resistant is equally essential. Draining any stagnant water around the home can prevent mosquitoes from laying eggs. This includes emptying flower pots, wading pools, and frequently changing birdbath water. Additionally, ensuring that homes have tightly fitted screens on windows and doors can keep mosquitoes at bay.
Animal Safety Recommendations
Owners should prioritize their animals’ safety as well. Eliminating standing water sources, such as buckets or wading pools, can reduce breeding grounds. Particularly after rainfall, it’s crucial to check these areas. Water troughs should be flushed weekly, and keeping horses indoors during the night can lower their exposure risk. Conversations with veterinarians about appropriate repellents and vaccinations for WNV and EEE are also beneficial. Moreover, suspected cases in animals should be reported to both the Department of Agricultural Resources and the Department of Public Health.
For comprehensive data on WNV and EEE positive results, interested individuals can visit the Arbovirus Surveillance Information page on Mass.gov. The DPH Division of Epidemiology is also available for inquiries at 617-983-6800.
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